unpin_message

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

No annotations are present, so the description carries the full burden. It discloses that the message_id parameter is optional and will unpin the most recent pinned message if omitted, which is helpful. However, it does not mention permissions required, what happens if the message is not pinned, or any error conditions.

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

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

The description is extremely concise: a single-purpose sentence followed by terse parameter explanations. Every piece of text earns its place without redundancy or fluff.

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

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

The tool has an output schema (not shown but present), so return value documentation is not needed. The description covers the core behavior and parameter defaults, but is incomplete regarding error handling, idempotency, and what happens if the specified message is not currently pinned.

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

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

With 0% schema description coverage, the description must add meaning. It explains that chat_id can be a chat ID or @channel_username, and defaults to the TELEGRAM_CHAT_ID environment variable. It also clarifies that message_id is optional, unpinning the most recent pinned message if not specified. This adds significant value beyond the raw schema.

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

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

The description clearly states 'Unpin a message in a chat', which is a specific verb+resource pair. It effectively distinguishes from sibling tools like 'pin_message' (opposite action) and 'delete_message' (different operation), though it does not explicitly name these alternatives.

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

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

No guidance is provided on when to use this tool versus alternatives (e.g., when a message is already unpinned or when using 'delete_message' instead). There is no mention of prerequisites, context, or when not to use it.

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