set_chat_description

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

With no annotations, the description carries the full burden. It states the mutation (set) but does not disclose permissions, side effects, or limitations beyond character length. Adequate for a simple setter but lacks depth.

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?

Two sentences with no extraneous words. The key behavior (set description) and parameter default are front-loaded, making it efficient and easy to parse.

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?

For a simple tool with two parameters and no output schema, the description covers the essential behavior and parameter nuance. No gaps are apparent given the tool's simplicity.

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?

The description adds context about the chat_id defaulting to the log group when omitted, which goes beyond the schema's 'optional' hint. Both parameters are documented with additional clarity, earning above baseline for high schema coverage.

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 the tool sets a new description for a chat, with a specific verb ('set') and resource ('chat description'). It distinguishes from siblings like set_chat_title and set_chat_photo by focusing on description only.

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?

The description explains default behavior when chat_id is omitted, which helps the agent understand usage without explicit alternatives. However, it does not provide when-not-to-use guidance or compare with sibling tools, which would be helpful but is not critical given the clarity of purpose.

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