TinyFn

subtract_time_2

Subtract time from a datetime.

Input Schema

TableJSON Schema

Name	Required	Description
`days`	No	Days to subtract
`hours`	No	Hours to subtract
`minutes`	No	Minutes to subtract
`seconds`	No	Seconds to subtract
`datetime_str`	Yes	Datetime in ISO format

Output Schema

TableJSON Schema

Name	Required	Description	Default
`error`	No
`result`	No
`original`	No
`subtracted`	No

Schema Changelog

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

Changed3 schema fields changedAug 29, 2026

removedOutput schema / $defs / SubtractTimeResponse

Removed value: -{
-  "properties": {
-    "error": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Error"
-    },
-    "original": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Original"
-    },
-    "result": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Result"
-    },
-    "subtracted": {
-      "anyOf": [
-        {
-          "$ref": "#/$defs/TimeAddedParts"
-        },
-        {
-          "type": "null"
-        }
-      ]
-    }
-  },
-  "title": "SubtractTimeResponse",
-  "type": "object"
-}

addedOutput schema / $defs / app__routers__time_utils__SubtractTimeResponse

Added value: +{
+  "properties": {
+    "error": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Error"
+    },
+    "original": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Original"
+    },
+    "result": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Result"
+    },
+    "subtracted": {
+      "anyOf": [
+        {
+          "$ref": "#/$defs/TimeAddedParts"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    }
+  },
+  "title": "SubtractTimeResponse",
+  "type": "object"
+}

changedOutput schema / x-fastmcp-top-level-schema

Previous value: -"SubtractTimeResponse"New value: +"app__routers__time_utils__SubtractTimeResponse"

Changed3 schema fields changedAug 29, 2026

addedOutput schema / $defs / SubtractTimeResponse

Added value: +{
+  "properties": {
+    "error": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Error"
+    },
+    "original": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Original"
+    },
+    "result": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Result"
+    },
+    "subtracted": {
+      "anyOf": [
+        {
+          "$ref": "#/$defs/TimeAddedParts"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    }
+  },
+  "title": "SubtractTimeResponse",
+  "type": "object"
+}

removedOutput schema / $defs / app__routers__time_utils__SubtractTimeResponse

Removed value: -{
-  "properties": {
-    "error": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Error"
-    },
-    "original": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Original"
-    },
-    "result": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Result"
-    },
-    "subtracted": {
-      "anyOf": [
-        {
-          "$ref": "#/$defs/TimeAddedParts"
-        },
-        {
-          "type": "null"
-        }
-      ]
-    }
-  },
-  "title": "SubtractTimeResponse",
-  "type": "object"
-}

changedOutput schema / x-fastmcp-top-level-schema

Previous value: -"app__routers__time_utils__SubtractTimeResponse"New value: +"SubtractTimeResponse"

Changed3 schema fields changedJul 27, 2026

removedOutput schema / $defs / SubtractTimeResponse

Removed value: -{
-  "properties": {
-    "error": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Error"
-    },
-    "original": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Original"
-    },
-    "result": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Result"
-    },
-    "subtracted": {
-      "anyOf": [
-        {
-          "$ref": "#/$defs/TimeAddedParts"
-        },
-        {
-          "type": "null"
-        }
-      ]
-    }
-  },
-  "title": "SubtractTimeResponse",
-  "type": "object"
-}

addedOutput schema / $defs / app__routers__time_utils__SubtractTimeResponse

Added value: +{
+  "properties": {
+    "error": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Error"
+    },
+    "original": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Original"
+    },
+    "result": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Result"
+    },
+    "subtracted": {
+      "anyOf": [
+        {
+          "$ref": "#/$defs/TimeAddedParts"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    }
+  },
+  "title": "SubtractTimeResponse",
+  "type": "object"
+}

changedOutput schema / x-fastmcp-top-level-schema

Previous value: -"SubtractTimeResponse"New value: +"app__routers__time_utils__SubtractTimeResponse"

Changed3 schema fields changedJul 17, 2026

addedOutput schema / $defs / SubtractTimeResponse

Added value: +{
+  "properties": {
+    "error": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Error"
+    },
+    "original": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Original"
+    },
+    "result": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Result"
+    },
+    "subtracted": {
+      "anyOf": [
+        {
+          "$ref": "#/$defs/TimeAddedParts"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    }
+  },
+  "title": "SubtractTimeResponse",
+  "type": "object"
+}

removedOutput schema / $defs / app__routers__time_utils__SubtractTimeResponse

Removed value: -{
-  "properties": {
-    "error": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Error"
-    },
-    "original": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Original"
-    },
-    "result": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Result"
-    },
-    "subtracted": {
-      "anyOf": [
-        {
-          "$ref": "#/$defs/TimeAddedParts"
-        },
-        {
-          "type": "null"
-        }
-      ]
-    }
-  },
-  "title": "SubtractTimeResponse",
-  "type": "object"
-}

changedOutput schema / x-fastmcp-top-level-schema

Previous value: -"app__routers__time_utils__SubtractTimeResponse"New value: +"SubtractTimeResponse"

Changed3 schema fields changedJul 13, 2026

removedOutput schema / $defs / SubtractTimeResponse

Removed value: -{
-  "properties": {
-    "error": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Error"
-    },
-    "original": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Original"
-    },
-    "result": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Result"
-    },
-    "subtracted": {
-      "anyOf": [
-        {
-          "$ref": "#/$defs/TimeAddedParts"
-        },
-        {
-          "type": "null"
-        }
-      ]
-    }
-  },
-  "title": "SubtractTimeResponse",
-  "type": "object"
-}

addedOutput schema / $defs / app__routers__time_utils__SubtractTimeResponse

Added value: +{
+  "properties": {
+    "error": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Error"
+    },
+    "original": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Original"
+    },
+    "result": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Result"
+    },
+    "subtracted": {
+      "anyOf": [
+        {
+          "$ref": "#/$defs/TimeAddedParts"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    }
+  },
+  "title": "SubtractTimeResponse",
+  "type": "object"
+}

changedOutput schema / x-fastmcp-top-level-schema

Previous value: -"SubtractTimeResponse"New value: +"app__routers__time_utils__SubtractTimeResponse"

Changed3 schema fields changedJul 8, 2026

addedOutput schema / $defs / SubtractTimeResponse

Added value: +{
+  "properties": {
+    "error": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Error"
+    },
+    "original": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Original"
+    },
+    "result": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "title": "Result"
+    },
+    "subtracted": {
+      "anyOf": [
+        {
+          "$ref": "#/$defs/TimeAddedParts"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    }
+  },
+  "title": "SubtractTimeResponse",
+  "type": "object"
+}

removedOutput schema / $defs / app__routers__time_utils__SubtractTimeResponse

Removed value: -{
-  "properties": {
-    "error": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Error"
-    },
-    "original": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Original"
-    },
-    "result": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ],
-      "title": "Result"
-    },
-    "subtracted": {
-      "anyOf": [
-        {
-          "$ref": "#/$defs/TimeAddedParts"
-        },
-        {
-          "type": "null"
-        }
-      ]
-    }
-  },
-  "title": "SubtractTimeResponse",
-  "type": "object"
-}

changedOutput schema / x-fastmcp-top-level-schema

Previous value: -"app__routers__time_utils__SubtractTimeResponse"New value: +"SubtractTimeResponse"

First observedJun 27, 2026

TDQS

C2.8/5.0

Behavior2/5

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It only restates the operation and does not mention output format, timezone handling, negative value support, or behavior on invalid datetime input.

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

Conciseness3/5

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

The description is short and front-loaded, but it is under-specified rather than efficiently informative. It essentially paraphrases the tool name without adding meaningful detail.

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

Completeness2/5

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

For a datetime tool with multiple sibling variants and no annotations, this is incomplete. It lacks usage conditions, output expectations, and any differentiation from similar tools, even though the parameter schema is well documented.

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

Parameters3/5

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

The input schema already documents all five parameters at 100% coverage, so the baseline applies. The description adds little beyond implying that the unit parameters are subtracted from `datetime_str`.

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

Purpose4/5

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

The description states the core operation clearly: subtracting a duration from a datetime. However, it does not distinguish this tool from the sibling `subtract_time`, which appears to serve the same purpose.

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

Usage Guidelines2/5

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

The description gives no guidance about when to use this tool versus alternatives like `add_time`, `add_time_2`, `subtract_time`, or `date_diff`. The intended use is only implied by the verb 'subtract' and the word 'datetime'.

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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TDQS

C2.3/5.0

Disambiguation2/5

Many tools have overlapping purposes, such as multiple random generators (random_integer, random_number), duplicate hashing functions (hash_md5, md5_checksum), and near-identical tools (compare, compare_2, compare_decimals). The sheer number of tools and lack of clear boundaries make it difficult for an agent to differentiate.

Naming Consistency1/5

Naming is highly inconsistent. There are duplicate tools with different names (camel_case vs to_camel_case, slug vs slugify), arbitrary suffixes like '_2', and mixing of patterns (e.g., generate_password vs password_entropy). No clear convention is followed.

Tool Count1/5

With 572 tools, the server is massively overpopulated for any coherent purpose. It includes trivial endpoints (true_endpoint, null, hello_world) and numerous duplicates, far exceeding a well-scoped utility set.

Completeness2/5

While the server covers many domains (math, strings, dates, colors, etc.), the presence of duplicate and trivial tools indicates a lack of thoughtful curation. There are gaps in basic operations (e.g., no dedicated file or network tools), and many tools are redundant.

subtract_time_2

Input Schema

Output Schema

Schema Changelog

TDQS

Glama MCP Gateway

TDQS

Resources