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

Annotations already declare destructiveHint=true and idempotentHint=false, so safety is covered. The description adds two behavioral facts not in the annotations: that a second, user-confirmed call (confirm=true) is required and the underlying DELETE endpoint. It doesn't spell out irreversibility explicitly, but the annotations plus this context are solid.

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 terse clauses, front-loaded with the action and id source, followed by the confirmation requirement and endpoint. No filler sentences; every fragment earns its place.

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 DELETE with full schema annotations and no meaningful return payload, this is essentially complete. A sentence on irreversibility or failure modes would round it out, but nothing required to invoke it correctly is missing.

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%, so both parameters (id and confirm) are already documented in the schema, including the confirmation protocol. The description restates both without adding format or edge-case detail, 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 a webhook subscription") and names the sibling tool that produces the required id (oblio_list_webhooks), which separates it cleanly from oblio_create_webhook and oblio_list_webhooks.

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 clear preconditions: obtain the id from oblio_list_webhooks and set confirm to true only after user confirmation. It stops short of stating when NOT to delete or what alternatives exist (e.g. disabling a subscription), so it is not a full 5.

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