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Lviv Public Transport

by io.github.vbhjckfd

Get Stop Geometry

get_stop_geometry
Read-onlyIdempotent

Returns static map context for a stop: its marker and polylines for every route that serves it. No live data is fetched. Use this when you need to enrich an existing map with route shapes (e.g. overlay polylines alongside a get_stop_realtime map block) or when the user asks to visualise which routes pass a stop without needing live arrivals. Do NOT use this when live arrival times or vehicle positions are needed — use get_stop_realtime instead. Requires a numeric stop ID; call get_stops_around_location first if you only have coordinates.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
stop_idYesMunicipal stop code shown on stop signage (e.g. 707). Accepts a positive integer or an equivalent digit-only string.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
dataYes
viewYes
ui_blocksYes

Schema Changelog

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

  1. Changed4 schema fields changed
    • removedInput schema / properties / stop_id / anyOf
      Removed value: -[
-  {
-    "description": "Positive integer stop code (e.g. 707).",
-    "exclusiveMinimum": 0,
-    "maximum": 9007199254740991,
-    "type": "integer"
-  },
-  {
-    "description": "Stop code as a digits-only string (e.g. \"707\").",
-    "pattern": "^\\d+$",
-    "type": "string"
-  }
-]
    • addedInput schema / properties / stop_id / exclusiveMinimum
      Added value: +0
    • addedInput schema / properties / stop_id / maximum
      Added value: +9007199254740991
    • addedInput schema / properties / stop_id / type
      Added value: +"integer"
  2. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": false,
+  "properties": {
+    "data": {
+      "additionalProperties": false,
+      "properties": {
+        "routes": {
+          "items": {
+            "additionalProperties": false,
+            "properties": {
+              "polyline": {
+                "items": {
+                  "items": {
+                    "type": "number"
+                  },
+                  "type": "array"
+                },
+                "type": "array"
+              },
+              "route": {
+                "type": "string"
+              }
+            },
+            "required": [
+              "route",
+              "polyline"
+            ],
+            "type": "object"
+          },
+          "type": "array"
+        },
+        "stop": {
+          "additionalProperties": false,
+          "properties": {
+            "id": {
+              "type": "string"
+            },
+            "lat": {
+              "anyOf": [
+                {
+                  "type": "number"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "lng": {
+              "anyOf": [
+                {
+                  "type": "number"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "name": {
+              "anyOf": [
+                {
+                  "type": "string"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            }
+          },
+          "required": [
+            "id",
+            "name",
+            "lat",
+            "lng"
+          ],
+          "type": "object"
+        },
+        "updated_at": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "stop",
+        "routes",
+        "updated_at"
+      ],
+      "type": "object"
+    },
+    "ui_blocks": {
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "data": {
+            "additionalProperties": false,
+            "properties": {
+              "center": {
+                "items": [
+                  {
+                    "anyOf": [
+                      {
+                        "type": "number"
+                      },
+                      {
+                        "type": "null"
+                      }
+                    ]
+                  },
+                  {
+                    "anyOf": [
+                      {
+                        "type": "number"
+                      },
+                      {
+                        "type": "null"
+                      }
+                    ]
+                  }
+                ],
+                "type": "array"
+              },
+              "routes": {
+                "items": {
+                  "additionalProperties": false,
+                  "properties": {
+                    "polyline": {
+                      "items": {
+                        "items": {
+                          "type": "number"
+                        },
+                        "type": "array"
+                      },
+                      "type": "array"
+                    },
+                    "route": {
+                      "type": "string"
+                    }
+                  },
+                  "required": [
+                    "route",
+                    "polyline"
+                  ],
+                  "type": "object"
+                },
+                "type": "array"
+              },
+              "stop": {
+                "anyOf": [
+                  {
+                    "additionalProperties": false,
+                    "properties": {
+                      "id": {
+                        "type": "string"
+                      },
+                      "lat": {
+                        "anyOf": [
+                          {
+                            "type": "number"
+                          },
+                          {
+                            "type": "null"
+                          }
+                        ]
+                      },
+                      "lng": {
+                        "anyOf": [
+                          {
+                            "type": "number"
+                          },
+                          {
+                            "type": "null"
+                          }
+                        ]
+                      },
+                      "name": {
+                        "anyOf": [
+                          {
+                            "type": "string"
+                          },
+                          {
+                            "type": "null"
+                          }
+                        ]
+                      }
+                    },
+                    "required": [
+                      "id",
+                      "name",
+                      "lat",
+                      "lng"
+                    ],
+                    "type": "object"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ]
+              },
+              "vehicles": {
+                "items": {
+                  "additionalProperties": false,
+                  "properties": {
+                    "bearing": {
+                      "anyOf": [
+                        {
+                          "type": "number"
+                        },
+                        {
+                          "type": "null"
+                        }
+                      ]
+                    },
+                    "eta_minutes": {
+                      "anyOf": [
+                        {
+                          "maximum": 9007199254740991,
+                          "minimum": -9007199254740991,
+                          "type": "integer"
+                        },
+                        {
+                          "type": "null"
+                        }
+                      ]
+                    },
+                    "eta_status": {
+                      "enum": [
+                        "assigned",
+                        "unassigned"
+                      ],
+                      "type": "string"
+                    },
+                    "id": {
+                      "type": "string"
+                    },
+                    "lat": {
+                      "anyOf": [
+                        {
+                          "type": "number"
+                        },
+                        {
+                          "type": "null"
+                        }
+                      ]
+                    },
+                    "lng": {
+                      "anyOf": [
+                        {
+                          "type": "number"
+                        },
+                        {
+                          "type": "null"
+                        }
+                      ]
+                    },
+                    "next_stop_id": {
+                      "anyOf": [
+                        {
+                          "type": "string"
+                        },
+                        {
+                          "type": "null"
+                        }
+                      ]
+                    },
+                    "route": {
+                      "anyOf": [
+                        {
+                          "type": "string"
+                        },
+                        {
+                          "type": "null"
+                        }
+                      ]
+                    }
+                  },
+                  "required": [
+                    "id",
+                    "route",
+                    "lat",
+                    "lng",
+                    "bearing",
+                    "next_stop_id",
+                    "eta_minutes",
+                    "eta_status"
+                  ],
+                  "type": "object"
+                },
+                "type": "array"
+              },
+              "zoom": {
+                "type": "number"
+              }
+            },
+            "required": [
+              "center",
+              "zoom",
+              "stop",
+              "routes",
+              "vehicles"
+            ],
+            "type": "object"
+          },
+          "type": {
+            "const": "map",
+            "type": "string"
+          }
+        },
+        "required": [
+          "type",
+          "data"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "view": {
+      "const": "transit_realtime",
+      "type": "string"
+    }
+  },
+  "required": [
+    "view",
+    "data",
+    "ui_blocks"
+  ],
+  "type": "object"
+}
  3. Changed2 schema fields changed
    • changedInput schema / properties / stop_id / anyOf
      Previous value: -[
-  {
-    "description": "Numeric municipal stop code (e.g. 707).",
-    "exclusiveMinimum": 0,
-    "maximum": 9007199254740991,
-    "type": "integer"
-  },
-  {
-    "description": "Municipal stop code as digits-only string (e.g. \"707\").",
-    "pattern": "^\\d+$",
-    "type": "string"
-  }
-]New value: +[
+  {
+    "description": "Positive integer stop code (e.g. 707).",
+    "exclusiveMinimum": 0,
+    "maximum": 9007199254740991,
+    "type": "integer"
+  },
+  {
+    "description": "Stop code as a digits-only string (e.g. \"707\").",
+    "pattern": "^\\d+$",
+    "type": "string"
+  }
+]
    • addedInput schema / properties / stop_id / description
      Added value: +"Municipal stop code shown on stop signage (e.g. 707). Accepts a positive integer or an equivalent digit-only string."
  4. First observed

TDQS

A4.7/5.0
Behavior4/5

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

Annotations already establish read-only and idempotent behavior. The description adds meaningful context by specifying 'static map context' and 'No live data is fetched', which is beyond the annotation hints. It does not contradict annotations, but could have added more about error conditions or response structure; however, the output schema covers the latter.

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 appropriately sized and front-loaded: the first sentence states the core purpose, followed by usage guidance, exclusions, and prerequisites. Every sentence contributes useful information without redundancy.

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 the tool's simple signature (one param, high schema coverage, and presence of an output schema), the description fully covers purpose, usage, exclusions, and prerequisites. It needs no further elaboration on return values because the output schema supplies that.

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% for the single parameter, and the schema already describes `stop_id` in detail. The description adds value by stating 'Requires a numeric stop ID' and providing a fallback instruction when only coordinates are available, which helps disambiguate how to obtain the required value.

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 clearly states the tool's action: 'Returns static map context for a stop: its marker and polylines for every route that serves it.' It also explicitly distinguishes itself from sibling `get_stop_realtime` by emphasizing 'No live data is fetched.'

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 provides explicit when-to-use and when-not-to-use guidance: 'Use this when you need to enrich an existing map with route shapes...' and 'Do NOT use this when live arrival times or vehicle positions are needed — use `get_stop_realtime` instead.' It also names a prerequisite for coordinate-based queries: 'call `get_stops_around_location` first if you only have coordinates.'

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

All Lviv Public Transport toolsInspect
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TDQS

A4.7/5.0
Disambiguation5/5

Each tool targets a distinct resource (route, stop, vehicle, nearby) and mode (static vs. realtime), with clear cross-references that prevent overlap. The descriptions explicitly state when to prefer one tool over another, eliminating ambiguity.

Naming Consistency5/5

All tool names follow a strict get_<resource>_<modifier> pattern (e.g., get_route_realtime, get_stop_geometry), making the API predictable. Verb and noun usage is uniform throughout the set.

Tool Count5/5

Seven tools is a well-scoped size for a transit data server, covering static and realtime data for routes, stops, and vehicles. Each tool serves a necessary purpose with no redundancy.

Completeness4/5

Core workflows (discover stops by location, get route and stop data, track vehicles) are well covered. The only notable gap is lack of stop search by name; get_stops_around_location requires coordinates, so a stop name alone cannot resolve without external geocoding.

Resources