search_index_index_add

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

The description reveals the auto-creation behavior, which is a key side effect not obvious from the schema. However, it lacks details on idempotency, error handling, or output format, though output schema may cover the latter.

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: one sentence explaining the action and one clarifying the docs format. No redundant information.

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 presence of an output schema and simple parameters, the description covers the main functionality and important side effect (auto-creation). It lacks discussion of failure modes but is sufficient for typical use.

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?

With 0% schema description coverage, the description adds value by specifying that 'docs' is a 'JSON array of dicts', clarifying the expected structure beyond the schema's items: {}.

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 'Add documents to an index' and distinguishes from sibling tools like search_index_index_create (which creates an empty index) by mentioning auto-creation.

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 guidance on when to use this tool vs alternatives such as search_index_index_create or search_index_index_search. The description only explains the action without context.

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