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

No annotations are provided, so the description carries the full burden. It clearly indicates the destructive nature ('Delete') and scopes to 'pending' entries, and discloses the return payload and token cost. However, it does not mention permanence, required permissions, or potential side effects on related data, which would be valuable for a delete operation.

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?

The description is four short sentences, front-loaded with the primary action, followed by the prerequisite, return value, and cost. Every sentence adds useful information with 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 simple two-parameter delete tool with an output schema, the description covers the action, prerequisite, connection targeting, and return value. It is adequate for an agent to invoke correctly, though it would benefit from a note distinguishing this from reject_waitlist_entry.

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%, with both clerk_instance_id and waitlist_entry_id already described in detail. The description restates the clerk_instance_id usage ('pass to target a specific connection, or omit to use the default') without adding new semantic information beyond the schema, so the baseline of 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?

Description uses the specific verb 'Delete' with the resource 'pending waitlist entry' in a Clerk application, making the action unambiguous. It clearly distinguishes from siblings like create_waitlist_entries, list_waitlist_entries, and reject_waitlist_entry, which have different purposes.

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?

The description explicitly states a prerequisite: call clerk.get_connected_accounts first. It also explains how to target a specific connection via clerk_instance_id or default to the default account. However, it does not explicitly mention when to prefer this over reject_waitlist_entry, which is a close sibling.

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