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

With no annotations, the description carries the full burden of behavioral disclosure. It discloses the $0.05 USDC cost, which is useful, but it omits any side effects, required permissions, or return format. More critically, the description's mention of ALLOW, BLOCK, or REVIEW contradicts the schema's action enum ('trade', 'transaction', 'token'), potentially misleading an agent about acceptable inputs.

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 brief and direct, consisting of two short sentences with no fluff. It front-loads the core purpose and then adds the cost, which is relevant operational information. Every word earns its place, making it highly concise.

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?

Given the tool's complexity—11 parameters, a nested transaction object, and no output schema—the description is severely incomplete. It does not explain what a 'pre-sign receipt' is, how the parameters relate, what the output looks like, or any usage constraints. An agent would not be able to invoke this tool correctly based solely on this description.

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 schema has 11 parameters with 0% description coverage, so the description must compensate by explaining parameters. It does not mention any parameter names or their meanings. The description introduces concepts (ALLOW, BLOCK, REVIEW) that do not correspond to any schema property, actively confusing parameter semantics rather than clarifying them.

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 clearly states the tool creates a signed pre-sign ALLOW, BLOCK, or REVIEW receipt, identifying both the verb ('Create') and the resource ('receipt'). However, the terms ALLOW, BLOCK, and REVIEW do not appear in the schema's action enum (which lists 'trade', 'transaction', 'token'), introducing some ambiguity. It is still distinguishable from sibling tools that check, verify, guard, or prepare transactions.

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 provides no guidance on when to use this tool versus the listed siblings. It does not mention alternatives, prerequisites, or exclusion criteria. The only additional context is the cost, which does not help an agent choose between tools.

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