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

With no annotations, the description carries the behavioral burden. It discloses the return format ('UTC ISO-8601 start/end instants'), which is useful since no output schema exists. However, it does not mention authentication requirements, rate limits, or explicitly confirm the operation is read-only/non-destructive.

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 tightly written sentences with zero waste. The primary purpose is front-loaded, and the return format follows as a useful secondary detail.

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 list tool with a fully described schema but no output schema, the description supplies the critical return-format information. The main gap is the absence of guidance on when to choose this tool over the sibling 'book_consult'.

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%, so the schema fully documents all four parameters including defaults and clamping behavior. The description adds only the phrase 'over a date range', which does not meaningfully extend parameter semantics 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 ('List') and resource ('open time slots') scoped to a 'Cicero consultation event type over a date range', which is clear and distinguishable from a booking tool. However, it does not explicitly name the sibling 'book_consult' or contrast itself with it, leaving some ambiguity for an agent deciding between listing and booking.

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?

The description provides no explicit when-to-use guidance or alternatives. It implies availability checking precedes booking but never states that 'book_consult' should be used for actual reservations, nor does it list exclusions or prerequisites.

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