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

Annotations declare destructiveHint=true and idempotentHint=true, so the safety profile is already covered. The description adds non-annotation context: the deletion is permanent and gated behind confirm=true, which is a real behavioral detail an agent must act on. It stops short of describing downstream effects (analytics history, auth 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?

Two short sentences, zero filler, with the permanence warning and the confirm gate front-loaded where an agent will see them.

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?

An output schema exists, so return values need not be explained, and annotations cover destructiveness and idempotency. What remains is minor: no statement about auth requirements or whether the deletion cascades to related analytics data.

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 0%, so the description must carry the parameters. It fully explains the non-obvious one — confirm must be set to true for deletion to occur — going well beyond the schema's bare boolean "Confirm". link_id is self-evident and left implicit.

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 ("Permanently delete a link"), and the adverb "permanently" implicitly separates it from sibling disable_link/enable_link. It does not explicitly name the reversible alternative, so it stops short of full sibling differentiation.

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: call this when a link should be removed for good, and the description tells the agent the confirm=true prerequisite. There is no explicit when-not guidance (e.g. "use disable_link if you only want to stop redirects") despite disable_link/enable_link being direct siblings.

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