get_communities_timeline

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

Discloses pagination behavior and that it only returns tweets from joined communities. Lacks details on rate limits, error handling, or empty results. No annotations provided to supplement.

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-line description with clear purpose followed by parameter details. No wasted words.

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?

Output schema exists to describe return values. Description covers tool purpose and parameter semantics adequately. Missing authentication details but implied by 'authenticated user'.

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?

Adds meaning beyond schema: default count 20, max 100, cursor is from previous next_cursor. Schema only has defaults and type. 0% schema coverage compensated well.

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?

Clearly states it gets tweets from all communities the authenticated user has joined, with pagination. Differentiates from siblings like get_community_tweets (specific community) and get_timeline (general).

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?

Indicates pagination and authentication context but does not specify when not to use or provide alternatives. Implicit usage through sibling context.

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