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

No annotations are provided, so the description carries the full burden of behavioral disclosure, and it discloses nothing: not whether output is a formatted string, not the accepted input formats, not any parsing/timezone assumptions. For a two-input transformation tool, this leaves the agent completely blind.

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 short but wastes its entire length on repetition of the name rather than front-loading any substance. This is under-specification rather than genuine conciseness.

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 tool with no annotations, no output schema, and an ambiguous `value` input, the definition supplies none of the context an agent needs to invoke it correctly. Nothing is covered.

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 nominally 100%, but the strings themselves are vacuous ("Date to process", "Value to process"), so the meaning of `value` and the expected format of `date` remain undefined. The description adds no parameter information whatsoever, leaving the schema's tautological text as the only source.

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 is "Relative Time: Relative Time", which merely restates the tool name and title without stating any verb, resource, or behavior. An agent cannot tell what this tool computes (e.g., converting a date to 'in 3 days' phrasing) or how it differs from siblings such as x402-time-ago, x402-days-since, or x402-time-until.

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 no guidance at all about when to use this tool versus the many overlapping time/duration siblings in the catalog. No conditions, no exclusions, no named alternatives are provided.

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