preindex_docs

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

No annotations are provided, so the description must disclose all behavioral traits. It mentions disk persistence and optional sitemap inclusion but omits details like network usage, error handling, permission requirements, or side effects. The description is too brief for a tool with zero 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 concise at two sentences, with the core action front-loaded. While it could be slightly more compact, it is well-structured and avoids unnecessary words.

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?

Given the tool has four parameters, no output schema, and no annotations, the description is incomplete. It does not explain how the cached indexes are later used, what constitutes a 'supported documentation site', or any prerequisites. This lacks sufficient context for an agent to use the tool correctly.

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% (no parameter descriptions in the schema). The description does not explain any of the four parameters (e.g., what 'libraries' expects, the format of 'persist_path', or the effect of 'include_sitemap'). The description must compensate for low coverage, but it fails to do so.

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 states the tool's purpose: to pre-download and persist documentation site indexes, enabling Serper-free search. It specifies the type of indexes (MkDocs/Sphinx) and the effect (caching to disk). This distinguishes it from sibling tools like 'get_docs' or 'semantic_search'.

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 description implies usage for enabling offline search without Serper, but it does not explicitly state when to use or not use this tool versus alternatives. Given sibling tools like 'filtered_search' and 'semantic_search', more explicit guidance would be helpful.

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