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

No annotations are provided, so the description must carry the behavioral burden itself. It does disclose an authentication requirement ('per signed wallet') and a rate limit ('5 free trial calls'), which is meaningful beyond the raw input schema. It doesn't explicitly say the operation is read-only, but the 'Uptime and restart count' wording makes that inference strong.

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 short, front-loaded with the actual purpose, and every clause carries either functional or trial-quota information. There is minor redundancy in 'Uptime: Uptime ...', but the overall length is appropriate for a zero-parameter tool.

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 zero-parameter tool with no output schema, the description provides the two output fields (uptime and restart count) and the wallet quota, which cover most of the invocation context. It does not specify the exact target service for the uptime or elaborate on the signed-wallet flow, but the complexity is low enough that the missing details are not crippling.

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 is empty (0 parameters), so schema coverage is trivially 100% and no parameter documentation is needed. The description adds value only by mentioning the signed-wallet context, but since there are no params, a baseline-4 score is appropriate.

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 names the resource ('Uptime and restart count') and implies a read/status operation, matching the tool name. It does not use a strong verb and does not differentiate from the sibling 'platform-uptime', but an agent can infer the tool returns uptime metrics for the x402 platform.

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?

No guidance is given about when to use this tool instead of alternatives like 'platform-uptime', 'get_stats', or 'service_discovery'. The only non-descriptive information, 'free trial calls per signed wallet', is pricing/quota context, not usage routing. Nothing tells the agent what this tool is better suited for.

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