get_email_thread

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

No annotations are provided, so the description must carry the burden. It states the tool gets messages with 'same or similar subject' sorted by date, but does not explicitly confirm it is a read-only operation or disclose any side effects (e.g., no marking as read). The verb 'get' implies read-only, but it's not explicit.

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 well-structured with a clear purpose sentence, an Args section with line breaks, and a Returns line. It is front-loaded and concise enough to be effective, though the 'User Preferences' line seems extraneous.

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 complexity (4 parameters, 2 required) and the presence of an output schema, the description adequately covers purpose, parameters, and return format. It does not address error scenarios or thread matching details, but is generally complete.

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 full meaning to each parameter: account with examples, subject_keyword usage, mailbox default and 'All' option, and max_messages with default. This goes beyond the schema's basic type/title.

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 uses the specific verb 'Get' and the resource 'email conversation thread', and clearly distinguishes from siblings like 'list_inbox_emails' or 'search_emails' by focusing on thread retrieval based on subject similarity.

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 explains what the tool does but does not provide explicit guidance on when to use it versus alternatives, nor does it mention when not to use it. The context of 'thread' is implied but not contrasted with other email listing tools.

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