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

Annotations already declare destructiveHint=true, idempotentHint=false, and openWorldHint=true, so the safety profile is covered. The description adds context the annotations cannot: the required manageBlog permission and that blog-scoped API keys are supported, which directly affects whether a call will succeed. It stops short of saying what happens to in-flight traffic or whether a missing ID errors out.

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?

Three short sentences with the action first and the permission prerequisite second — nothing redundant, and the critical scoping constraint is front-loaded rather than buried.

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 two-parameter destructive tool with full schema coverage, an output schema, and rich annotations, the description supplies the one thing structured data lacks: the authorization requirement. It would be complete with a note on behavior when the redirect or blog does not exist.

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 both parameters are documented there, including the list_blogs hint for blogId. The description only restates that the redirect is identified 'by ID', adding no format, scope, or edge-case detail beyond the schema. 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?

The description opens with a specific verb+resource+lookup key: 'Delete a redirect by ID'. That is enough for an agent to distinguish delete_redirect from get_redirect, update_redirect, and the unrelated delete_* siblings without inspecting any 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?

Usage is only implied by the verb 'Delete' — remove an existing redirect. No alternatives or exclusions are named (e.g. when to update a redirect instead, or what happens when a redirect is auto-created/removed), and there is no guidance on pruning stale redirects vs deleting them individually.

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