Get Gmail Threads Content Batch

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

With annotations already declaring readOnlyHint=true, idempotentHint=true, and destructiveHint=false, the description adds valuable context beyond these: the batch limit of 25 threads and the rationale (SSL connection exhaustion). The parameter description also notes automatic batching in chunks of 25, which is additional behavioral detail. 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?

The description is exactly two sentences, both front-loaded and free of filler. The first sentence delivers the core purpose, the second provides a key constraint. Every word earns its place, making it an exemplary concise description.

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 output schema exists, annotations cover safety, and schema descriptions cover all parameters, the description only needs to convey the tool's unique value and constraints. It does that well by highlighting batch retrieval and the 25-thread limit. It could mention alternatives for full completeness, but the existing information is sufficient for an agent to select and invoke the tool correctly.

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%, so the baseline is 3. The description itself does not add parameter-level semantics beyond what the schema provides. The schema already contains detailed explanations for thread_ids (batching) and body_format (text/html/raw), so no compensation is needed. The description adds no extra value here.

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 specific verb and resource: 'Retrieves the content of multiple Gmail threads in a single batch request.' This distinguishes it from sibling tools like get_gmail_thread_content (single thread) and get_gmail_messages_content_batch (messages, not threads) by focusing on 'multiple threads' and 'batch'. The addition of the 25-thread limit further clarifies its scope.

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 for fetching multiple threads at once and provides a rationale ('to prevent SSL connection exhaustion'). However, it does not explicitly name alternatives or state when not to use this tool, though the name and context make batch usage clear. Given the existence of a sibling for single threads, a brief 'for a single thread, use get_gmail_thread_content' would have made it a 5.

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