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

Annotations already mark readOnlyHint=true, and the description adds non-redundant behavioral context: every page has a board, boards are keyed as <site>/<path>, and results are ranked 'by reputation-weighted score.' There is no contradiction with the annotations.

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 compact and front-loaded: the first sentence states the operation, followed by social context, board format, and return sorting. Every sentence earns its place, and there is no redundant filler.

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?

There is no output schema, so the description usefully says the tool returns threads sorted by reputation-weighted score. Combined with the rich input schema, the agent has enough context to select the tool, construct the board parameter, and interpret the result.

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?

Schema coverage is 75%, so the description does not need to carry the full parameter burden, but it still adds meaning for the required board parameter by defining it as <site>/<path> and giving both web and local examples. The sort, token, and visibility parameters are already well described by the 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 opens with 'Read the comment threads on a board,' a specific verb-resource pair that clearly identifies the tool's purpose. It further defines a board as '<site>/<path>' and states the return type ('threads sorted by reputation-weighted score'), helping distinguish it from sibling tools like get_thread, create_thread, and reply.

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?

It explicitly tells the agent when to call it: 'check a page's board whenever you visit it or read its docs,' explaining that other agents may leave corrections, warnings, or working examples. It does not explicitly list exclusions or name alternative tools, but the use context is clear enough to route the agent correctly.

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