Transit Land

List Feeds

list_feeds

Read-onlyIdempotent

List available GTFS (or GTFS-RT/MDS) feeds aggregated by Transitland; filter by spec type and paginate with limit; returns feed id, url, operator, and last fetch status.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`spec`	No	gtfs \| gtfs-rt \| mds (default gtfs)
`limit`	No

Output Schema

TableJSON Schema

Name	Required	Description	Default
`meta`	No
`feeds`	No	List of available feeds

Schema Changelog

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

Changed13 schema fields changedJun 2, 2026

addedOutput schema / properties / feeds / items / properties / authorization

Added value: +{
+  "properties": {
+    "info_url": {
+      "type": "string"
+    },
+    "param_name": {
+      "type": "string"
+    },
+    "type": {
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

addedOutput schema / properties / feeds / items / properties / feed_state

Added value: +{
+  "properties": {
+    "feed_version": {
+      "type": [
+        "null",
+        "object"
+      ]
+    }
+  },
+  "type": "object"
+}

addedOutput schema / properties / feeds / items / properties / feed_versions

Added value: +{
+  "items": {
+    "properties": {
+      "earliest_calendar_date": {
+        "type": "string"
+      },
+      "fetched_at": {
+        "type": "string"
+      },
+      "id": {
+        "type": "number"
+      },
+      "latest_calendar_date": {
+        "type": "string"
+      },
+      "sha1": {
+        "type": "string"
+      },
+      "url": {
+        "type": "string"
+      }
+    },
+    "type": "object"
+  },
+  "type": "array"
+}

changedOutput schema / properties / feeds / items / properties / id / type
```
Previous value: -"string"New value: +"number"
```
addedOutput schema / properties / feeds / items / properties / languages
```
Added value: +{
+  "type": "null"
+}
```

removedOutput schema / properties / feeds / items / properties / latest_fetch_time

Removed value: -{
-  "description": "ISO timestamp of latest fetch",
-  "type": "string"
-}

addedOutput schema / properties / feeds / items / properties / license

Added value: +{
+  "properties": {
+    "attribution_instructions": {
+      "type": "string"
+    },
+    "attribution_text": {
+      "type": "string"
+    },
+    "commercial_use_allowed": {
+      "type": "string"
+    },
+    "create_derived_product": {
+      "type": "string"
+    },
+    "redistribution_allowed": {
+      "type": "string"
+    },
+    "share_alike_optional": {
+      "type": "string"
+    },
+    "spdx_identifier": {
+      "type": "string"
+    },
+    "url": {
+      "type": "string"
+    },
+    "use_without_attribution": {
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

addedOutput schema / properties / feeds / items / properties / name
```
Added value: +{
+  "type": "null"
+}
```
addedOutput schema / properties / feeds / items / properties / onestop_id
```
Added value: +{
+  "type": "string"
+}
```

removedOutput schema / properties / feeds / items / properties / operators

Removed value: -{
-  "description": "Operators served by this feed",
-  "items": {
-    "type": "object"
-  },
-  "type": "array"
-}

addedOutput schema / properties / feeds / items / properties / tags

Added value: +{
+  "properties": {
+    "exclude_from_global_query": {
+      "type": "string"
+    },
+    "gtfs_data_exchange": {
+      "type": "string"
+    },
+    "manual_import": {
+      "type": "string"
+    },
+    "notes": {
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

addedOutput schema / properties / feeds / items / properties / urls / properties

Added value: +{
+  "gbfs_auto_discovery": {
+    "type": "string"
+  },
+  "mds_provider": {
+    "type": "string"
+  },
+  "realtime_alerts": {
+    "type": "string"
+  },
+  "realtime_trip_updates": {
+    "type": "string"
+  },
+  "realtime_vehicle_positions": {
+    "type": "string"
+  },
+  "static_current": {
+    "type": "string"
+  },
+  "static_historic": {
+    "items": {
+      "type": [
+        "string",
+        null
+      ]
+    },
+    "type": "array"
+  },
+  "static_planned": {
+    "items": {},
+    "type": "array"
+  }
+}

addedOutput schema / properties / meta

Added value: +{
+  "properties": {
+    "after": {
+      "type": "number"
+    },
+    "next": {
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

Changed2 schema fields changedMay 22, 2026

addedInput schema / examples

Added value: +[
+  {
+    "limit": 50,
+    "spec": "gtfs"
+  }
+]

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "description": "Available GTFS/GTFS-RT/MDS feeds",
+  "properties": {
+    "feeds": {
+      "description": "List of available feeds",
+      "items": {
+        "properties": {
+          "id": {
+            "description": "Transitland feed onestop_id",
+            "type": "string"
+          },
+          "latest_fetch_time": {
+            "description": "ISO timestamp of latest fetch",
+            "type": "string"
+          },
+          "operators": {
+            "description": "Operators served by this feed",
+            "items": {
+              "type": "object"
+            },
+            "type": "array"
+          },
+          "spec": {
+            "description": "Feed specification (gtfs|gtfs-rt|mds)",
+            "type": "string"
+          },
+          "urls": {
+            "description": "Feed download/access URLs",
+            "type": "object"
+          }
+        },
+        "type": "object"
+      },
+      "type": "array"
+    }
+  },
+  "type": "object"
+}

First observedMay 13, 2026

TDQS

A4.5/5.0

Behavior4/5

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

Annotations already provide safety traits (read-only, idempotent). The description adds behavioral details: specific return fields (feed id, url, operator, last fetch status) and pagination behavior, going beyond what annotations provide.

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?

One concise sentence (25 words) that front-loads the action and includes all key elements. No wasted words.

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 low complexity (2 optional params) and presence of an output schema, the description fully covers what the tool does, how to use it, and what it returns.

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 only 50%, but the description adds meaning to both parameters: 'filter by spec type' for 'spec' and 'paginate with limit' for 'limit', compensating for the missing schema description on 'limit'.

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 uses a specific verb 'List' and resource 'feeds', adds context about Transitland aggregation, and distinguishes from sibling tools which focus on different entities (agencies, routes, stops).

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

Usage Guidelines4/5

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

The description implies usage for listing available feeds with filtering and pagination. No explicit alternatives are mentioned, but the sibling tools do not offer similar functionality, so the context is clear.

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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