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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false, and the description usefully adds a prerequisite the annotations don't carry: a `full_access` API key is required. It stops short of stating the consequence (that mail to the address will resume sending) or whether the deletion is reversible.

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-loaded with the action in a single short sentence, with the auth requirement immediately after. The trailing API route and operationId are low-value metadata for an agent but do no real harm.

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 one-parameter destructive tool whose safety profile is fully covered by annotations and whose parameter is fully documented in the schema, the description says enough to invoke it correctly. The main omission is the downstream effect of removing a suppression.

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 100% and the single parameter is already documented in the schema, including that the email must be URL-encoded. The description adds no syntax, format, or lookup guidance beyond that, so the baseline of 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 and resource ('Remove a suppression') that is unambiguous and clearly the inverse of the sibling create_suppression. It doesn't explicitly contrast with list_suppressions or explain what a suppression is, but the operation itself is unmistakable.

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?

Usage is implied by the verb and resource — an agent would call this to delete an entry from the suppression list. There is no explicit when-to-use/when-not-to-use guidance and no mention of the related validate/unsuppress workflow, leaving routing to inference.

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