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

The annotation only declares readOnlyHint=false, so the description does useful work by disclosing that the operation is disabled and unavailable in this version. Beyond that it says nothing about what recording an event does, what the event payload must contain, or any permissions required. Given the sparse annotation coverage, a 3 reflects added value that is real but incomplete.

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?

Two short sentences, no filler, and the critical availability caveat is stated immediately after the purpose. Nothing could be trimmed without losing information.

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 an unusable, disabled tool the description gives the agent enough to know not to call it, which is the key decision. However, with a nested free-form object parameter at 0% schema coverage and no output schema, the definition would be inadequate if the tool were ever enabled.

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 0%, and 'event' is a free-form nested object with no declared shape, so the description carries the full burden here. It mentions 'agreement event' loosely tying the event parameter to the agreement domain, but explains nothing about resource_id or the required event structure, leaving both required parameters effectively undocumented.

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 names a specific verb and resource ('Record a bilateral agreement event'), which is more than a restatement of the tool name. It is clear what domain the tool operates in, though it offers no differentiation from any sibling (the siblings listed are unrelated post/reputation tools), so it lands at a solid 4 rather than 5.

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?

It gives an explicit usage constraint: 'Disabled in this version (agreements are off)', which is a strong when-not-to-use signal that an agent needs before invoking. It does not name an alternative tool or explain what to do instead, so it falls short of a 5.

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