index_directory

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

No annotations exist, so the description must fully disclose behavioral traits. It mentions that it generates embeddings and stores them, but fails to disclose side effects such as overwriting behavior, performance implications for large directories, or whether it modifies files. Important safety and idempotency details are missing.

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 (three lines) and front-loaded with the main action. It includes a structured 'Args' section. No unnecessary words, but could be slightly more compact.

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's medium complexity and the presence of an output schema, the description covers the basic functionality well but omits constraints like directory existence, permission requirements, and handling of nested directories. It is adequate but not fully comprehensive.

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 description adds significant meaning beyond the schema by specifying that directory_path must be an absolute path and providing examples for the ignore parameter (e.g., '*.log', 'drafts'). This compensates for the schema's lack of property descriptions (0% coverage).

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 scans a local directory, extracts text from multiple file types (PDF, DOCX, TXT, MD, and raw media bytes), generates semantic embeddings using Gemini 2, and stores them for searching. It uses specific verbs and resources, and the function is distinct from siblings like listing or removing indexes.

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?

No explicit guidance is provided about when to use this tool versus alternatives. It does not mention prerequisites (e.g., directory existence, permissions) or edge cases like re-indexing. The description only explains what it does, not when it should or should not be used.

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