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

The annotations declare destructiveHint=true and readOnlyHint=false, yet the description insists it is a 'sample policy preview, not validated authority' that 'does not ... persist a budget change' and 'grants no authority.' A non-persisting preview is not a destructive operation, so the description contradicts the annotations. The description is also internally inconsistent, calling the backend both unavailable/historical and live.

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 text is bloated with repeated disclaimers ('catalog proxy entry,' 'not a guarantee of backend availability,' 'grants no authority') and is poorly front-loaded, leading with an unavailable-backend caveat rather than the tool's purpose. Several sentences restate the same hedging idea.

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 policy-decision tool with no output schema and 0% parameter coverage, the description should explain the decision response and required inputs, but it mostly enumerates what the tool does NOT do. It surfaces error/availability behavior, which is useful, but the contradictions leave an agent unable to know whether a call has real effect.

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?

Only one parameter ('mode') exists and schema description coverage is 0%, so the description carries the burden — but it only says 'Supply its documented mode, arguments, and required signed authority or grant,' deferring to external documentation. It adds no syntax, format, or value domain for the single parameter.

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 definition does name a specific function — returning allow/deny decisions against runs, fees, rails and callback constraints — and distinguishes itself from siblings by stating it does not load an allowance or enforce anything. However, it opens with 'Unavailable historical backend' and 'Sandbox/demo,' which directly conflicts with the later claim that it 'Makes live allow or deny decisions,' leaving the agent unsure what the tool actually is.

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?

There is an implied context ('before an agent exceeds permitted runs, fees, rails, or callback destinations'), but no explicit when-to-use versus the ~25 sibling tools such as wever_agent-allowance-console or wever_agent-permission-ledger. No prerequisites or exclusions are stated beyond a generic reference to credentials and grants.

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