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. It discloses nothing: no mention of units, return format, fixed constants, or computation scope. The agent cannot predict what invoking this tool will do.

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 only three words, but this is under-specification rather than conciseness. Not a single piece of actionable information about the tool is conveyed.

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?

With no annotations, no output schema, and a tautological description, the definition is completely inadequate. An agent cannot determine inputs, outputs, units, or how this differs from the many nearby physics/velocity siblings.

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 0 parameters, which normally earns a baseline of 4, but the description fails to clarify the semantics of calling a tool named 'escape velocity' with no inputs — e.g., whether it returns a constant for Earth or requires values missing from the schema. 'Velocity of escape' adds no meaning beyond the empty schema.

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 'Escape Velocity: Velocity of escape' is a pure tautology that restates the tool name without saying what the tool does. It does not specify a verb, an operation, or what value it computes, and it cannot be distinguished from siblings like x402-velocity or x402-speed based on this text.

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 whatsoever about when to use this tool versus alternatives such as x402-velocity, x402-speed, or x402-gravitational-force. With thousands of sibling tools, an agent receives zero routing signal.

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