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

Annotations already declare destructiveHint=true and idempotentHint=true, and the description reinforces irreversibility. It adds real value beyond annotations by disclosing the concrete consequence: inbound calls to /email/trigger/ with the deleted trigger_key begin returning 404 immediately. It stops short of stating auth/permission requirements.

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?

Front-loads the action, then the usage condition, then the downstream risk. Three tight sentences. 'This action is irreversible' overlaps with destructiveHint but serves as a closing emphasis, so minor redundancy only.

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 single-param destructive tool with rich annotations and no output schema, the description covers action, trigger condition, precondition and failure mode. Complete enough to invoke safely; only explicit alternative-tool routing is absent.

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% and the single trigger_id parameter is fully documented as a UUID in the schema. The description only restates that identification is by UUID, adding no format or constraint detail the schema lacks, so the baseline 3 applies.

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?

States a specific verb ('permanently delete') plus resource ('email trigger') and identifier type ('by UUID'). 'Permanently' cleanly separates it from the sibling meisa_deactivate_trigger, so an agent can route without opening either schema.

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?

Gives a clear usage condition ('when the user wants to retire a transactional email mapping') and a precondition (confirm the upstream caller has migrated). It does not explicitly name deactivate_trigger as the reversible alternative, which leaves one inference to the agent.

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