get_thread

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

With no annotations, the description carries the burden of behavioral disclosure. It does clarify that the tool fetches the entire thread, not just a single email, which is useful. However, it does not mention whether the operation is read-only, potential side effects, authentication requirements, or error behavior, though '拉取' implies a read operation.

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 one concise sentence that front-loads the main action and appends the critical parameter format. There is no redundancy or filler; every word contributes value.

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?

For a tool with one parameter and an output schema, the description covers the essential parameter semantics and thread scope. However, it lacks usage context relative to sibling tools and any explicit note about the read-only nature or error conditions, so it is adequate but not fully 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?

The schema provides zero description for email_id (0% coverage), making this the only source of parameter meaning. The description specifies the exact format 'folder:uid' and gives a concrete example 'INBOX:1', which is essential for correct invocation.

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 states a specific action (拉取/fetch) and a specific resource (整条会话线程/entire conversation thread), and even adds the required email_id format. It clearly identifies what the tool does, but does not explicitly distinguish it from sibling tools like read_email.

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 is provided about when to use this tool versus alternatives such as read_email or search_emails. The description only states the core function and parameter format, leaving usage decisions entirely to inference.

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