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SoapyRED

FreightUtils MCP Server

by SoapyRED
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TypeScript
Hybrid

ldm_calculator

Read-onlyIdempotent

Calculate loading metres for European road freight to see how much trailer length your pallet load occupies and whether it fits the vehicle.

Instructions

Calculate loading metres (LDM) for European road freight — how much trailer length a pallet load occupies. 1 LDM = 1 linear metre of a 2.4m-wide trailer; a standard artic is 13.6 LDM.

Provide a pallet preset OR custom length_mm + width_mm — omitting both errors with a usage hint. Behavior: deterministic; stackable=true with stack_height 2 or 3 divides the floor footprint accordingly; fits reports whether the load fits the chosen vehicle's LENGTH (give weight_kg to also see total_weight_kg against the vehicle's max payload); utilisation_percent is of the vehicle's length. Rate-limited (anonymous use: 25 requests/day per IP): a 429 error body carries retry_after_seconds and a Retry-After header — back off and retry, or call get_subscribe_link for higher limits.

Returns: ldm, vehicle (name, length_m, max_payload_kg), utilisation_percent, pallet_spaces (used/available), total_weight_kg, fits and warnings under result, plus confidence, _source and citation (the FreightUtils v1 response envelope).

Related: vehicle_lookup (the trailer specs behind the vehicle presets), pallet_fitting_calculator (boxes onto one pallet), consignment_calculator (mixed lines including LDM).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
palletNoPallet preset: euro=1200x800mm, uk=1200x1000mm, half=800x600mm, quarter=600x400mm. Provide this OR length_mm + width_mm.
vehicleNoVehicle preset: artic = 13.6m curtainsider (default), rigid10 = DEPRECATED, removal in 3.0.0 (it still answers with the same figures and returns a DEPRECATED advisory in warnings[]; its 10 m length is published by no manufacturer for any rigid — use custom with vehicle_length_m, or artic), rigid75 = 7.5t rigid, luton = 3.5t Luton van, us53 = 53ft US/Canada trailer, us48 = 48ft US trailer, or custom. EU presets divide by the 2.40 m loading-metre convention; US trailers divide by their own 2.591 m internal width, because loading metres are not the North American pricing unit.
quantityNoNumber of pallets. Default: 1.
width_mmNoCustom pallet width in millimetres. Example: 980.
length_mmNoCustom pallet length in millimetres (use with width_mm instead of a preset). Example: 1140.
stackableNoWhether pallets can be double/triple-stacked — halves (or thirds) the floor footprint. Default: false.
weight_kgNoWeight per pallet in kg — enables the payload side of the fits check.
stack_heightNoStack height when stackable: 2 or 3. Default: 2.
vehicle_length_mNoCustom vehicle load length in metres (required when vehicle=custom).

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
okYes
resultYes
_sourceYes
citationYes
validityNo
warningsNo
confidenceYes
blocking_errorsNo
envelope_versionYes
normalized_inputNo

Schema Changelog

Changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. Changed5 schema fields changedv2.17.2
    • addedOutput schema / properties / _source / properties / authority_current_edition
      Added value: +{
+  "type": "string"
+}
    • addedOutput schema / properties / _source / properties / checked_at
      Added value: +{
+  "type": "string"
+}
    • addedOutput schema / properties / _source / properties / dataset_edition
      Added value: +{
+  "type": "string"
+}
    • removedOutput schema / properties / envelope_version / const
      Removed value: -"1"
    • addedOutput schema / properties / envelope_version / enum
      Added value: +[
+  "1",
+  "1.1"
+]
  2. Changed2 schema fields changedv2.14.1
    • changedInput schema / properties / vehicle / description
      Previous value: -"Vehicle preset: artic 13.6m (default), rigid10 = 10m rigid, rigid75 = 7.5t rigid, luton van, or custom."New value: +"Vehicle preset: artic = 13.6m curtainsider (default), rigid10 = DEPRECATED, removal in 3.0.0 (it still answers with the same figures and returns a DEPRECATED advisory in warnings[]; its 10 m length is published by no manufacturer for any rigid — use custom with vehicle_length_m, or artic), rigid75 = 7.5t rigid, luton = 3.5t Luton van, us53 = 53ft US/Canada trailer, us48 = 48ft US trailer, or custom. EU presets divide by the 2.40 m loading-metre convention; US trailers divide by their own 2.591 m internal width, because loading metres are not the North American pricing unit."
    • changedInput schema / properties / vehicle / enum
      Previous value: -[
-  "artic",
-  "rigid10",
-  "rigid75",
-  "luton",
-  "custom"
-]New value: +[
+  "artic",
+  "rigid10",
+  "rigid75",
+  "luton",
+  "us53",
+  "us48",
+  "custom"
+]
  3. Changed10 schema fields changedv2.11.0
    • changedInput schema / properties / length_mm / description
      Previous value: -"Custom pallet length in mm (use instead of preset)"New value: +"Custom pallet length in millimetres (use with width_mm instead of a preset). Example: 1140."
    • changedInput schema / properties / pallet / description
      Previous value: -"Pallet preset. Euro=1200x800mm, UK=1200x1000mm, Half=800x600mm, Quarter=600x400mm"New value: +"Pallet preset: euro=1200x800mm, uk=1200x1000mm, half=800x600mm, quarter=600x400mm. Provide this OR length_mm + width_mm."
    • changedInput schema / properties / quantity / description
      Previous value: -"Number of pallets (default: 1)"New value: +"Number of pallets. Default: 1."
    • changedInput schema / properties / stack_height / description
      Previous value: -"Stack height: 2 or 3 (default: 2)"New value: +"Stack height when stackable: 2 or 3. Default: 2."
    • changedInput schema / properties / stackable / description
      Previous value: -"Can pallets be stacked? (default: false)"New value: +"Whether pallets can be double/triple-stacked — halves (or thirds) the floor footprint. Default: false."
    • changedInput schema / properties / vehicle / description
      Previous value: -"Vehicle type (default: artic 13.6m)"New value: +"Vehicle preset: artic 13.6m (default), rigid10 = 10m rigid, rigid75 = 7.5t rigid, luton van, or custom."
    • changedInput schema / properties / vehicle_length_m / description
      Previous value: -"Custom vehicle length in metres (required if vehicle=custom)"New value: +"Custom vehicle load length in metres (required when vehicle=custom)."
    • changedInput schema / properties / weight_kg / description
      Previous value: -"Weight per pallet in kg"New value: +"Weight per pallet in kg — enables the payload side of the fits check."
    • changedInput schema / properties / width_mm / description
      Previous value: -"Custom pallet width in mm (use instead of preset)"New value: +"Custom pallet width in millimetres. Example: 980."
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": false,
+  "properties": {
+    "_source": {
+      "additionalProperties": false,
+      "properties": {
+        "checked": {
+          "type": "string"
+        },
+        "name": {
+          "type": "string"
+        },
+        "provenance_status": {
+          "enum": [
+            "verified",
+            "pending-verification",
+            "computed",
+            "live"
+          ],
+          "type": "string"
+        },
+        "source_url": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "name",
+        "checked",
+        "provenance_status"
+      ],
+      "type": "object"
+    },
+    "blocking_errors": {
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "code": {
+            "type": "string"
+          },
+          "message": {
+            "type": "string"
+          },
+          "recovery": {
+            "additionalProperties": false,
+            "properties": {
+              "action": {
+                "type": "string"
+              },
+              "params": {
+                "additionalProperties": {},
+                "type": "object"
+              },
+              "tool": {
+                "type": "string"
+              }
+            },
+            "required": [
+              "action"
+            ],
+            "type": "object"
+          }
+        },
+        "required": [
+          "code",
+          "message",
+          "recovery"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "citation": {
+      "additionalProperties": false,
+      "properties": {
+        "qualifier": {
+          "type": "string"
+        },
+        "text": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "text"
+      ],
+      "type": "object"
+    },
+    "confidence": {
+      "additionalProperties": false,
+      "properties": {
+        "basis": {
+          "enum": [
+            "deterministic",
+            "provenance",
+            "match_quality",
+            "freshness"
+          ],
+          "type": "string"
+        },
+        "level": {
+          "enum": [
+            "high",
+            "medium",
+            "low"
+          ],
+          "type": "string"
+        },
+        "score": {
+          "maximum": 1,
+          "minimum": 0,
+          "type": "number"
+        }
+      },
+      "required": [
+        "level",
+        "basis"
+      ],
+      "type": "object"
+    },
+    "envelope_version": {
+      "const": "1",
+      "type": "string"
+    },
+    "normalized_input": {
+      "additionalProperties": {},
+      "type": "object"
+    },
+    "ok": {
+      "type": "boolean"
+    },
+    "result": {
+      "anyOf": [
+        {
+          "additionalProperties": true,
+          "properties": {
+            "fits": {
+              "type": [
+                "boolean",
+                "null"
+              ]
+            },
+            "ldm": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "meta": {
+              "anyOf": [
+                {
+                  "additionalProperties": {},
+                  "type": "object"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "pallet_spaces": {
+              "anyOf": [
+                {
+                  "additionalProperties": true,
+                  "properties": {
+                    "available": {
+                      "type": [
+                        "number",
+                        "null"
+                      ]
+                    },
+                    "used": {
+                      "type": [
+                        "number",
+                        "null"
+                      ]
+                    }
+                  },
+                  "type": "object"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "total_weight_kg": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "utilisation_percent": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "vehicle": {
+              "anyOf": [
+                {
+                  "additionalProperties": true,
+                  "properties": {
+                    "length_m": {
+                      "type": [
+                        "number",
+                        "null"
+                      ]
+                    },
+                    "max_payload_kg": {
+                      "type": [
+                        "number",
+                        "null"
+                      ]
+                    },
+                    "name": {
+                      "type": [
+                        "string",
+                        "null"
+                      ]
+                    }
+                  },
+                  "type": "object"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "warnings": {
+              "anyOf": [
+                {
+                  "items": {},
+                  "type": "array"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            }
+          },
+          "type": "object"
+        },
+        {
+          "additionalProperties": {},
+          "type": "object"
+        }
+      ]
+    },
+    "validity": {
+      "additionalProperties": false,
+      "properties": {
+        "as_of": {
+          "type": "string"
+        },
+        "effective_from": {
+          "type": "string"
+        },
+        "effective_to": {
+          "type": [
+            "string",
+            "null"
+          ]
+        }
+      },
+      "required": [
+        "as_of"
+      ],
+      "type": "object"
+    },
+    "warnings": {
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "code": {
+            "type": "string"
+          },
+          "details": {
+            "additionalProperties": {},
+            "type": "object"
+          },
+          "message": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "code",
+          "message"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    }
+  },
+  "required": [
+    "envelope_version",
+    "ok",
+    "result",
+    "confidence",
+    "_source",
+    "citation"
+  ],
+  "type": "object"
+}
  4. First observedv1.0.0

TDQS

A4.9/5.0
Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

The annotations already declare readOnlyHint, idempotentHint, and destructiveHint, so the description needs to add only behavioral context, which it does: rate-limiting at 25/day with 429 retry handling, deterministic behavior, stackable semantics, the length-only fits check, and the warning/depreceived advisories. No contradiction with the annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is long but every sentence earns its place: it defines, lists required/optional combinations, explains behavioral results, names rate-limit/retry rules, and routes to siblings. The structure is logical — concept, usage, behavior, output, related tools — with no filler or repetition.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given 9 parameters, 2 enums, no required params, and an output schema, the description is complete enough to invoke the tool correctly. It covers the critical success condition (pallet vs custom dimensions), vehicle presets including deprecation, rate limits and retry, the result envelope fields, and the sibling-tool routing. Nothing an agent needs to call it correctly is missing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% with rich descriptions for every parameter, so the schema does most of the heavy lifting. The description adds useful cross-parameter semantics that the schema alone cannot convey: the 'pallet preset OR custom length_mm + width_mm' exclusivity, the stack_stack_height effect on floor footprint, and the effect of weight_gg enabling the payload part of fits.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description opens with a specific verb and resource: 'Calculate loading metres (LDM) for European road freight' and defines the unit precisely ('1 LDM = 1 linear metre of a 2.4m-wide trailer'). It differentiates this calculator from related sibling tools by pointing to vehicle_lookup, pallet_fitting_calculator, and consignment_calculator with distinct one-line scopes.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description gives explicit usage rules: 'Provide a pallet preset OR custom length_cm + width_mm — omitting both fails with a usage hint,' and explains optional-parameter trade-offs such as 'give weight_kg to also see total_weight_kg' and 'stackable = true with stack_height 2 or 3'. It also names alternatives through the Related list, letting the agent route to the right sibling.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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