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PostProxy MCP Server

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dm_chats_list

Read-onlyIdempotent

List direct-message chats for a DM-capable profile across Facebook Messenger, Instagram, Telegram, and Bluesky, ordered by most recent activity.

Instructions

List direct-message chats (conversations) for a DM-capable profile, ordered by most recent activity. Supported on Facebook (Messenger), Instagram, Telegram, and Bluesky.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pageNoPage number (zero-indexed, default 0)
afterNoISO 8601 timestamp — only chats with last_message_at after this
beforeNoISO 8601 timestamp — only chats with last_message_at before this
per_pageNoItems per page (default 20)
profile_idYesProfile hashid (Facebook, Instagram, Telegram, or Bluesky)
Behavior4/5

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

Annotations already indicate read-only, idempotent, non-destructive (readOnlyHint, idempotentHint, destructiveHint). Description adds value by stating ordering 'by most recent activity' and platform support. No contradiction.

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?

Two concise sentences; front-loaded with key action and resource; no wasted words.

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

Completeness3/5

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

Adequate for a list tool with good annotations and 100% schema coverage. However, no output schema and description omits return format (e.g., list of chat objects) and pagination details, which would enhance completeness.

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?

Schema coverage is 100% with all parameters described. Description adds no additional parameter meaning beyond what is already in the schema. Baseline score of 3 is appropriate.

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?

Clearly states verb 'List', resource 'direct-message chats', and scope 'for a DM-capable profile, ordered by most recent activity'. Distinguishes from siblings like 'dm_chat_get' and 'dm_messages_list'.

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?

Specifies supported platforms (Facebook, Instagram, Telegram, Bluesky) providing context. Lacks explicit 'when not to use' or alternatives, but is clear enough for selection.

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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