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

The description front-loads 'Permanently withdraw', which asserts an irreversible removal, while the annotations declare destructiveHint=false (i.e. only additive updates). That is a direct conflict on the irreversibility axis. The otherwise-useful details (name-match refusal semantics, open-sale restriction) cannot offset a contradiction with the structured safety hint.

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?

Four short sentences, each loading-bearing: action and permanence first, then the validation rule, then the constraint, then the escape hatch. No filler, and the critical facts are front-loaded.

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 mutation with no output schema, the description covers preconditions and failure modes adequately. It omits what the caller gets back after a successful withdraw (relevant since no output schema exists), which is the only notable gap.

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% for both required params, so the description must compensate. It does so well for thing_name (must be the exact current name, mismatches refuse), but thing_id is never mentioned, leaving one of two parameters to guesswork.

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 description gives a specific verb (withdraw) plus the resource and its scope: 'one active thing you own', and 'Permanently' signals irreversibility. It is clear what the tool does, though it never names a sibling (transfer, thing_edit) to sharpen the boundary.

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?

It states the preconditions (must own, must be active, cannot be in an open sale) and routes a specific case to a sibling ('Lost? Call front_door'). It stops short of an explicit when-to-use-this-vs-siblings statement, but the practical usage context is well covered.

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