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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is fully covered by structured data. The description's only behavioral addition is 'Effects and required fields depend on that operation,' which defers rather than discloses, and it says nothing about permissions or output. With annotations carrying the load, a 3 is appropriate.

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?

Three short sentences, front-loaded with the dispatcher role, which is good. But the plural framing ('operations listed below', 'when available') is boilerplate when only one operation exists, and 'Effects and required fields depend on that operation' restates the preceding sentence without adding 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?

There is no output schema, so the description should ideally convey what get_project_health returns, and it does not. Annotations and a fully documented nested schema cover the invocation side, but the agent gets no sense of the payload's meaning or shape.

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 100%, with the operation enum and payload fields fully documented in the schema, including ID format constraints and the pattern for projectId. The description adds only the tautological 'Select operation and its matching payload,' so baseline 3 is correct.

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 identifies itself as a compatibility dispatcher for 'validation read operations' and names the single supported operation, get_project_health. However, it never says what that operation actually does, so the agent learns the routing mechanics but not the resource being read. Clear enough to invoke, vague on purpose.

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?

Explicit guidance: 'prefer the individually named tool when available' tells the agent this is a fallback path, and the sibling get_project_health is the obvious preferred alternative. It doesn't state positively when this dispatcher IS the right choice (e.g., legacy clients), so it stops 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.