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

The description materially extends the annotations' destructiveHint=true by specifying that 'cancel' is permanent and that 'skip_next' stops charges/bookings for one week. It also discloses the auth requirement and that resume/reactivate are gated behind the account owner's emailed approval link, with no contradiction to the annotations.

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?

Every sentence earns its place: scope, action semantics, stop-only boundary, and auth requirement. The core verb+resource is front-loaded and there is no filler or repetition.

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 tool with no output schema, the description covers the critical side effects, auth, and unsupported actions well. The only notable gap is that it does not describe what a 'status' call returns, although the action name and read-only hint partially cover that.

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?

The input schema already documents both required parameters at 100% coverage, which sets a baseline of 3. The description adds useful action-level semantics beyond the schema, including permanence of cancel and the one-week billing effect of skip_next.

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?

The opening clause 'Check or stop a recurring lane automation' names specific verbs and a concrete resource, and the action list makes the scope explicit. It is immediately distinguishable from sibling creation tool automate_lane and related receipt/lane-history tools.

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 frames the tool as STOP-ONLY and warns there is no agent-side resume, reactivate, or ceiling change, so an agent knows when not to use it. It does not directly name sibling alternatives such as automate_lane in the description, though token provenance in the schema points there, which keeps it just shy of a 5.

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