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

readOnlyHint=true already establishes the safety profile, so the bar is lower. The description adds one genuinely useful behavioral detail - that results carry ambiguity and metadata warnings - but says nothing about pagination behavior, ranking, or result volume even though paging params exist.

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 tight sentences that front-load the action and the filter list, then note the distinctive return behavior. No filler, though the second sentence could be more specific about what a 'metadata warning' means.

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?

An output schema exists, so return values need not be spelled out, and the description reasonably covers the primary filter set. It is still thin for a 10-parameter search tool, omitting any mention of paging, the audience enum, or how limit interacts with results.

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 only 20% across 10 params, so the description must compensate. It names five filter dimensions (keyword, framework, version, package, tags) but is silent on limit, cursor, locale, audience, and explain, leaving half the surface undocumented in prose.

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 and resource (search the docs by keyword) and enumerates the filter dimensions, so it is clearly a query tool rather than a lister. It stops short of naming how it differs from siblings like list_docs or list_search_facets.

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?

The word 'search ... by keyword' implies the usage context but there is no explicit when-to-use, no condition selecting this over list_docs/list_search_facets, and no note on prerequisites. An agent must infer the routing itself.

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