post_index_subject

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

Annotations provide non-readOnly, non-destructive, non-idempotent hints. Description adds ownership context ('created by current user') but lacks details on side effects, duplicate behavior, or limits. No contradiction with 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?

Single sentence with no waste. Concise but could benefit from more structure (e.g., listing key parameters) without adding length.

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 high schema coverage and output schema, the description omits critical context like what 'subject_id' represents, the purpose of 'sort' and 'comment', and behavior on duplicate entries. Incomplete for a write operation with nested params.

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 100% with individual field descriptions. Description adds no extra meaning beyond the schema, so baseline 3 is appropriate.

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 entry') and resource ('directory created by current user'). It distinguishes from siblings like delete_index_subject and get_index_subjects, though 'entry' is vague but clarified by the schema's subject_id.

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 on when to use this tool vs alternatives (e.g., post_index_collection, put_index_subject). Context about ownership is present but no exclusions or prerequisites.

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