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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and closed-world, so the safety profile is fully covered. The description adds only that pricing is organized into three named components, without saying whether it returns a narrative, figures, or definitions.

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?

It is a single short sentence, so nothing is wasted in length, but it is structured as an unexplained list of internal terms rather than front-loading what the agent gets back. Brevity comes at the cost of intelligibility.

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 parameterless informational tool with no output schema, the description should at least indicate the shape of the returned content (pricing model explanation, figures, definitions). It gestures at three components but never states what an agent will receive, leaving a real gap.

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 tool takes zero parameters, so there is nothing for the description to disambiguate; baseline 4 applies. The description does not mislead about inputs.

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 the resource (Callvu pricing) and lists three pricing components, but there is no verb indicating what the tool actually does (returns pricing details? a narrative explanation?). Terms like 'Governed Resolution' and 'proof of value' are internal jargon an agent cannot interpret, leaving the purpose only broadly inferable.

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 on when to call this versus siblings such as get_procurement_pack, get_company_overview, or estimate_cost_of_doing_nothing. The agent must guess whether this is the right source for cost questions.

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