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

With no annotations present, the description carries the full burden of behavioral disclosure, but 'Edit an existing EMAIL template' only conveys mutation. It does not state whether fields are partially updated, whether existing values are overwritten, what permissions are required, or what the tool returns after success.

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, efficient sentence with the action and resource front-loaded. There is no filler or redundancy. It is slightly under-specified rather than padded, which is appropriate for the conciseness dimension even though it hurts completeness.

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 four parameters, no annotations, and no output schema, the description is too thin. It fails to explain update semantics, required id usage, whether body/name/subject are all editable in one call, or what the response looks like. An agent would need to infer most details from parameter names alone.

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 0%, so the description must compensate for the undocumented parameters, but it does not. The property names id, body, name, and subject are reasonably self-explanatory, yet the description adds no detail about which fields are updated, how body/subject/name interact, or the meaning of the required id.

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 a specific verb ('Edit') and a clear resource ('EMAIL template'), and clarifies it applies to an existing item, distinguishing it from create/delete/get siblings. It also signals the EMAIL domain, separating it from sms_templates_update. It could go further by naming the exact editable fields, but the core purpose is unambiguous.

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 when-to-use guidance or explicit alternatives are provided. The phrase 'existing EMAIL template' implies this is not for creation, but the description never instructs the agent to prefer this tool over email_templates_create, email_templates_delete, or sms_templates_update in relevant scenarios.

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