Amazing Marvin MCP

by bgheneti

Overview Schema Source Related Servers Discussions Admin

Python

Remote

stop_time_tracking

Stops active time tracking for a specified task, ending the session and logging duration.

Instructions

Stop time tracking for a specific task

Input Schema

TableJSON Schema

Name	Required	Description	Default
`task_id`	Yes
`debug`	No

Output Schema

TableJSON Schema

Name	Required	Description	Default
`data`	Yes
`metadata`	Yes	Metadata about the data itself
`summary`	Yes	Human-readable insights
`debug`	Yes
`success`	Yes
`api_version`	No		current
`response_version`	No		1.0

Schema Changelog

Changes observed during successful MCP inspections.

Changed15 schema fields changedv0.1.7May 3, 2026

addedInput schema / additionalProperties
```
Added value: +false
```

removedOutput schema / $defs

Removed value: -{
-  "ErrorDetails": {
-    "properties": {
-      "error_type": {
-        "type": "string"
-      },
-      "message": {
-        "type": "string"
-      },
-      "retry_suggested": {
-        "default": false,
-        "type": "boolean"
-      },
-      "user_message": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "error_type",
-      "message",
-      "user_message"
-    ],
-    "type": "object"
-  },
-  "ResponseDebug": {
-    "properties": {
-      "api_calls_made": {
-        "default": 1,
-        "type": "integer"
-      },
-      "api_endpoint": {
-        "type": "string"
-      },
-      "cache_hit": {
-        "default": false,
-        "type": "boolean"
-      },
-      "error": {
-        "anyOf": [
-          {
-            "$ref": "#/$defs/ErrorDetails"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "response_time_ms": {
-        "type": "integer"
-      },
-      "warnings": {
-        "anyOf": [
-          {
-            "items": {
-              "type": "string"
-            },
-            "type": "array"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      }
-    },
-    "required": [
-      "api_endpoint",
-      "response_time_ms"
-    ],
-    "type": "object"
-  },
-  "ResponseMetadata": {
-    "properties": {
-      "count": {
-        "type": "integer"
-      },
-      "data_freshness": {
-        "default": "real_time",
-        "type": "string"
-      },
-      "end_date": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "filters_applied": {
-        "anyOf": [
-          {
-            "items": {
-              "type": "string"
-            },
-            "type": "array"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "source": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "start_date": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      }
-    },
-    "required": [
-      "count"
-    ],
-    "type": "object"
-  },
-  "ResponseSummary": {
-    "properties": {
-      "action_completed": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "status": {
-        "type": "string"
-      },
-      "text": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "text",
-      "status"
-    ],
-    "type": "object"
-  }
-}

addedOutput schema / description

Added value: +"Standard response structure for all tools"

removedOutput schema / properties / data / title
```
Removed value: -"Data"
```

changedOutput schema / properties / debug / anyOf

Previous value: -[
-  {
-    "$ref": "#/$defs/ResponseDebug"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "description": "Technical execution details",
+    "properties": {
+      "api_calls_made": {
+        "default": 1,
+        "type": "integer"
+      },
+      "api_endpoint": {
+        "type": "string"
+      },
+      "cache_hit": {
+        "default": false,
+        "type": "boolean"
+      },
+      "error": {
+        "anyOf": [
+          {
+            "description": "Structured error information",
+            "properties": {
+              "error_type": {
+                "type": "string"
+              },
+              "message": {
+                "type": "string"
+              },
+              "retry_suggested": {
+                "default": false,
+                "type": "boolean"
+              },
+              "user_message": {
+                "type": "string"
+              }
+            },
+            "required": [
+              "error_type",
+              "message",
+              "user_message"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "response_time_ms": {
+        "type": "integer"
+      },
+      "warnings": {
+        "anyOf": [
+          {
+            "items": {
+              "type": "string"
+            },
+            "type": "array"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      }
+    },
+    "required": [
+      "api_endpoint",
+      "response_time_ms"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / metadata / $ref
```
Removed value: -"#/$defs/ResponseMetadata"
```
addedOutput schema / properties / metadata / description
```
Added value: +"Metadata about the data itself"
```

addedOutput schema / properties / metadata / properties

Added value: +{
+  "count": {
+    "type": "integer"
+  },
+  "data_freshness": {
+    "default": "real_time",
+    "type": "string"
+  },
+  "end_date": {
+    "anyOf": [
+      {
+        "type": "string"
+      },
+      {
+        "type": "null"
+      }
+    ],
+    "default": null
+  },
+  "filters_applied": {
+    "anyOf": [
+      {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      {
+        "type": "null"
+      }
+    ],
+    "default": null
+  },
+  "source": {
+    "anyOf": [
+      {
+        "type": "string"
+      },
+      {
+        "type": "null"
+      }
+    ],
+    "default": null
+  },
+  "start_date": {
+    "anyOf": [
+      {
+        "type": "string"
+      },
+      {
+        "type": "null"
+      }
+    ],
+    "default": null
+  }
+}

addedOutput schema / properties / metadata / required
```
Added value: +[
+  "count"
+]
```
addedOutput schema / properties / metadata / type
```
Added value: +"object"
```
removedOutput schema / properties / summary / $ref
```
Removed value: -"#/$defs/ResponseSummary"
```
addedOutput schema / properties / summary / description
```
Added value: +"Human-readable insights"
```

addedOutput schema / properties / summary / properties

Added value: +{
+  "action_completed": {
+    "anyOf": [
+      {
+        "type": "string"
+      },
+      {
+        "type": "null"
+      }
+    ],
+    "default": null
+  },
+  "status": {
+    "type": "string"
+  },
+  "text": {
+    "type": "string"
+  }
+}

addedOutput schema / properties / summary / required
```
Added value: +[
+  "text",
+  "status"
+]
```
addedOutput schema / properties / summary / type
```
Added value: +"object"
```

First observedv1.0.1Feb 1, 2026

TDQS

C2.6/5.0

Behavior1/5

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

No annotations provided; description lacks any behavioral details such as side effects, error conditions, or idempotency.

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

Conciseness4/5

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

Single sentence with no redundancy; however, it omits essential details for a useful description.

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?

Even with an output schema, description fails to mention return value or behavior when tracking not started, leaving critical gaps.

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

Parameters1/5

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

Schema coverage is 0%; description does not explain the purpose or format of 'task_id' or 'debug' parameter.

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?

Description clearly states action 'stop time tracking' and target 'for a specific task', differentiating from sibling 'start_time_tracking'.

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?

No guidance on when to use vs. alternatives (e.g., when tracking is not active), and no prerequisites mentioned.

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