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

Annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile is covered structurally; the description adds the user-confirmation requirement and the ownership precondition, which go beyond annotations. It does not say what happens when the slug is missing or unauthorized, which is the remaining gap.

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?

Two sentences, both load-bearing: the first establishes the action and its scope, the second carries the irreversibility warning and the confirmation instruction. The warning 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 one-parameter destructive tool with full annotation coverage and no output schema, this covers what an agent needs before acting: scope, identifier forms, irreversibility, and a required confirmation. Only post-call behavior (error or missing-slug handling) is left unspecified.

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 parameter's description already says 'Paste slug or pastes.io link.' The prose restates the same accepted formats without adding syntax, examples, or resolution rules, so the schema does the work.

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 ('delete') plus resource ('paste'), the scope ('the account owns'), and the accepted identifier forms ('by slug or pastes.io link'). The verb alone distinguishes it cleanly from create_paste, get_paste, and list_pastes in the sibling set.

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 procedural rule ('confirm with the user first'), which is the meaningful usage constraint for a destructive tool. It does not name alternatives or when-not-to-use cases, but no sibling offers an overlapping destructive capability, so little is lost.

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