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

With no annotations, the description carries the full burden, and it does disclose the key behavior: it collects two answers and returns a booking link rather than booking anything itself. However, it doesn't state whether the answers are stored or passed to the adviser, whether a lead is created, or what the returned link looks like/how long it is valid.

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 sentences, no filler, with the action and output front-loaded before the usage condition. Every clause contributes guidance.

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 simple two-parameter tool with no output schema, the description covers what it takes, what it returns, and when to call it. It could say slightly more about what happens to the supplied answers, but nothing critical to correct invocation is missing.

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 coverage is 100% and both params are documented in the schema, so baseline is 3. The description adds only that the inputs are 'two short answers', which does not add format or content guidance beyond the 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 states a specific verb and outcome (return a booking link) plus the resource (a call with the licensed adviser who would do the work), and clarifies the input is 'two short answers'. It doesn't name a specific sibling alternative, so the differentiation from informational tools is only implied by the last clause.

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 when the person you are acting for wants to proceed rather than only to understand' gives a clear positive trigger and an implicit exclusion (understanding-only requests should go to the lookup tools). It stops short of naming an alternative tool by name.

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