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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false, so the safety profile is covered. The description adds genuine blast-radius context beyond the annotations: the source post and messages in other destinations remain available, which tells the agent the deletion is scoped rather than cascading.

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 precondition front-loaded, the required input second, and the scope caveat last. No redundancy or filler.

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-parameter destructive mutation with an output schema and full annotation coverage, the description supplies the needed when-to-use and scope-of-effect information. The only gap is not naming the sibling tool that handles the non-published case.

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 schema itself explains that publicationId is a delivery/job id from list_publications, distinct from postId. The description only says 'supply its publicationId' and adds no format, sourcing, or edge-case detail beyond the schema, so 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 and resource: delete one message previously published by Postlyra, keyed by publicationId. It scopes the effect to a single publication. However, it does not distinguish itself from the closely related siblings cancel_publication or archive_post, which an agent will likely weigh against this tool.

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 an explicit precondition — use only when the author explicitly asks to delete an already-published message — which implicitly excludes scheduled/unpublished items. It never names cancel_publication or archive_post as the alternatives for those cases, so the routing is left partly to inference.

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