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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered elsewhere. The description adds nothing behavioral beyond the safety profile — no note on how matching works (substring vs fuzzy), case sensitivity, result limits, or empty-result handling.

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?

A single sentence that front-loads the tool's function before the examples. The example list is somewhat long but earns its place by illustrating the kind of input expected.

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 one-parameter search tool with no output schema, the annotations cover safety and the description covers intent. What's missing is return-shape context (what a hit looks like, result count behavior) and any routing guidance among the many sibling search/list tools.

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 description coverage is 0% with one required parameter (q) that has no documented meaning in the schema. The description partially compensates by giving example query strings ("homicide", "parole", "90%"), which hints at multi-word/free-text matching, though it never states the search semantics directly.

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?

States a verb ("Find") and resource ("GPS Historical Data series and dated rule changes"), and even gives example query terms. However, several siblings (list_historical_series, get_historical_series, get_historical_events) operate in the same territory, and the description never clarifies whether this is keyword search, listing, or retrieval — the agent must infer it from the name alone.

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 statement of when to use this tool versus the many sibling retrieval tools (get_historical_series, list_historical_series, get_historical_events, search_quotes). The example terms imply free-text search, but no explicit context, prerequisites, or exclusions are given.

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