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

With no annotations provided, the description carries the full burden and does disclose useful traits: it is free, requires no key, and returns the same data as the public board. It does not mention rate limits, freshness delays, or error behavior, but for a zero-parameter read operation these are minor gaps.

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 two sentences with no wasted words. It front-loads the resource and current-time scope, then lists the exact metrics, and closes with cost and access information.

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 parameterless, read-only snapshot tool, the description covers what is returned, the scope, and access requirements. It could be more complete by addressing how the result relates to get_history or get_roster, but nothing essential to invoking it is missing.

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 tool has zero parameters, so the baseline is 4 and there is little to document. The description adds a relevant note that no key is needed, which clarifies the expected call requirements beyond the empty 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 identifies the resource ('all 30 Sector Pulse baskets') and states exactly what data is returned: average % move, median, breadth, and three rank bases. It is specific and informative, though it lacks an explicit verb like 'returns' or 'fetches' and does not directly contrast with sibling tools.

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?

There is no guidance on when to use this tool versus get_history or get_roster. 'Right now' implies a current snapshot, but the description never names alternatives or exclusions, leaving the agent to infer the appropriate use case.

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