doc_index_repo

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

With no annotations, the description carries full burden. It discloses the file types processed (.md/.txt), the parsing and storage steps, and the auto-enabling condition for embeddings based on environment configuration. This covers key behavioral traits without contradictions.

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 extremely concise at three sentences, with no filler. Each sentence adds distinct value: core action, process steps, and embedding configuration condition. Front-loaded with the verb and resource.

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?

Despite no output schema, the description does not mention what the tool returns after indexing (e.g., success message, index summary). It also omits details about overwrite behavior or side effects on existing indices. For a tool with 6 parameters, this is a gap in completeness.

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 input schema already provides 100% parameter description coverage, so the description does not add significant new meaning beyond what the schema offers. The description's mention of embeddings aligns with the use_embeddings parameter but does not deepen understanding of other parameters.

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 action (Index), the resource (GitHub repository's documentation), and the process (fetches .md/.txt files, parses sections, saves to local storage). It uniquely distinguishes from sibling tools like index_local which targets local directories.

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 context (when you need to index a GitHub repo's docs) but does not explicitly state when to use this tool vs. alternatives like index_local or other indexing tools. No when-not conditions or alternatives are mentioned.

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