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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so 'Read-only' at the end is redundant. The description does add real behavior beyond that: each returned piece carries its sources and a statement of what not to conclude, and the tool refuses to name a brand as the answer. That is useful, but it says nothing about result volume, ranking, or what happens on a zero-hit query.

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?

Front-loaded with 'What Morris knows about club fitting' and organized into scope, personalization, and constraint. The long manufacturer/topic enumeration in the first sentence is bulky, but each sentence carries a distinct job, so there is little genuine waste.

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 single-parameter retrieval tool with no output schema, the description covers domain scope, how to combine results with the player's data, and the non-prescriptive constraint. It is essentially complete for correct invocation; only retrieval mechanics (result count, relevance behavior) are left unstated, which is minor here.

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 100% and the query parameter already carries four illustrative examples and length bounds, so the schema does the heavy lifting. The description contributes topical framing (what kinds of fitting questions are in scope) but no additional guidance on phrasing or granularity beyond the schema examples.

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 specific verb+resource (search a curated club-fitting knowledge base) and enumerates the topical scope: launch/spin windows, impact location, shafts and flex, loft, lie, length, grip size. The scope implicitly separates it from search_instruction, search_rules, and search_teacher_corpus, but it never names a sibling to make the distinction explicit.

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?

Gives a concrete usage pattern — combine results with get_bag, get_trackman_range, and list_trackman_sessions to personalize — and a clear boundary (never prescribes equipment, a real fitting decides). Missing an explicit 'when not to use this / use X instead' against the other search_* tools, so it stops short of a 5.

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