Postlyra.app — Telegram posts from AI chats

List Telegram channels

list_channels

Read-onlyIdempotent

Use this when you need to list Telegram channels, groups, and chats the authorized user can manage through Postlyra.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "list_channels"
  }
}

Input Schema

Name	Required	Description	Default
No arguments

Output Schema

Name	Required	Description	Default
`message`	Yes
`channels`	Yes
`connectUrl`	No
`telegramAccount`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 13, 2026

addedOutput schema / properties / telegramAccount

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": false,
+      "properties": {
+        "accountHint": {
+          "type": "string"
+        },
+        "displayName": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "label": {
+          "type": "string"
+        },
+        "username": {
+          "type": [
+            "string",
+            "null"
+          ]
+        }
+      },
+      "required": [
+        "label",
+        "username",
+        "displayName",
+        "accountHint"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

Changed2 schema fields changedOct 13, 2026
- addedOutput schema / properties / channels / items / properties / permissionHelp
```
Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}
```
- addedOutput schema / properties / connectUrl
```
Added value: +{
+  "type": "string"
+}
```
First observedSep 11, 2026

TDQS

A3.6/5.0

Behavior3/5

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered by structured data. The description adds one useful behavioral fact — results are limited to channels the authorized user can manage — but says nothing about ordering, pagination, or auth requirements beyond that.

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?

A single efficient sentence with no waste. It is slightly front-loaded with the filler phrase "Use this when you need to" rather than leading with the action, but it remains compact.

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

Completeness4/5

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

An output schema exists, so return-value detail is unnecessary, and the annotations cover the safety profile. For a zero-parameter read tool this is close to complete, with only pagination/ordering behavior left unstated.

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?

The tool takes zero parameters, so the description has no parameter semantics to explain; the baseline of 4 applies. Nothing in the description misleads about the parameterless signature.

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 a specific verb (list) and resource (Telegram channels, groups, and chats) and scopes it to what the authorized user can manage. It is clear, though it does not explicitly differentiate itself from list_publications/list_signatures/list_templates siblings beyond the resource noun.

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

Usage Guidelines3/5

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

"Use this when you need to list Telegram channels..." gives implied usage context but names no alternatives, no prerequisites, and no when-not-to-use conditions. Adequate but minimal.

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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