gmail_insert_smime

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

No annotations are provided, so the description must disclose behavioral traits. It only states 'Upload', implying a write operation, but fails to mention what happens if the certificate already exists, required permissions, side effects, or whether changes are reversible. The description is too minimal for a security-sensitive 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 a single sentence of 10 words, extremely concise and front-loaded. However, it could include a bit more context without becoming verbose, such as mentioning prerequisites or output. Still, it earns its place with no wasted words.

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 has 4 parameters, no output schema, and involves uploading a security-sensitive certificate, the description is incomplete. It omits that the send-as alias must exist, that pkcs12 must be base64-encoded, and what the response looks like. No warnings about irreversible changes or required scopes are provided.

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 coverage is 100%, so baseline is 3. The description adds no extra meaning beyond the parameter names and types. For example, it does not explain how 'isDefault' interacts with existing default settings or that 'encryptedKeyPassword' is conditional. The description relies entirely on the schema.

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 verb 'Upload' and the resource 'S/MIME certificate (PKCS#12) for a send-as alias'. It distinguishes from sibling tools like list, get, delete, set_default, which involve reading, deleting, or setting defaults rather than uploading.

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 provides no guidance on when to use this tool versus alternatives (e.g., gmail_enable_cse_keypair). It does not state prerequisites (e.g., send-as alias must exist) or exclusions. Usage is merely implied by the action description.

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