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 covered structurally. The description adds only that the scoreboard is 'private', which hints at per-desk scoping, but says nothing about the credential requirement or result freshness. Modest added value over annotations.

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?

A single front-loaded sentence with no filler and the action stated first. It is appropriately sized, though it spends words listing return content that the output schema already supplies.

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?

An output schema exists, so return values need no prose; annotations cover the read-only/idempotent profile and the schema fully documents parameters. The remaining gap is sibling differentiation and any prerequisite context for the secret desk_key, which is only covered in the schema.

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%, and the schema itself documents both parameters (including the credential semantics of desk_key and the optional filter). The description adds no parameter-level meaning, so the baseline of 3 applies.

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?

Clear verb ('view') plus resource ('private sender domain scoreboard') and enumerates the content returned: yield rates and recent pitch evaluations. An agent can tell it apart from write-oriented siblings like score_message or submit_feedback, though it never names those alternatives.

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?

'Use this to view...' implies the usage context but gives no when-not condition and never routes the agent to a sibling. With eight sibling tools present, the absence of any differentiation leaves the agent to infer selection from names alone.

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