subscriber_update

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

No annotations provided, so description must disclose behavioral traits. It only says 'Update' without explaining side effects (e.g., password rehashing), idempotency, or that only provided fields are updated (partial update). Insufficient for a mutation tool.

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?

Single sentence front-loading purpose. Very concise, but lacks necessary detail. Not excessively wordy, but could include more information without being verbose.

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 3 params, no nested objects, and an output schema (not shown), the description is too minimal. It does not clarify optional fields (partial update), allowed values, or how it differs from subscriber_create (e.g., required id). Incomplete for reliable agent decision-making.

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%. Description mentions 'password or attributes' but the only additional param is email_address; 'attributes' is ambiguous. Does not explain the purpose of id (required integer) or constraints on email/password format. Does not compensate for missing schema descriptions.

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 'Update a subscriber's password or attributes.' It specifies the verb 'Update' and resource 'subscriber,' but 'attributes' is vague; the schema only shows password and email_address. It distinguishes from subscriber_create and subscriber_delete but lacks precision.

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 on when to use this tool vs alternatives like subscriber_bulk_import for bulk updates, or subscriber_create for creating. No prerequisites or conditions mentioned.

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