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

With no annotations provided, the description carries the full burden of behavioral disclosure. It restates the tool name without adding context about return format, authentication needs, timezone handling, or what 'available' means (e.g., excluding already-booked slots). The description is minimal and largely tautological.

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?

The description is a single, front-loaded sentence with no unnecessary words. It efficiently communicates the core function.

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?

Given no output schema and no annotations, the description is sparse. It omits the return value structure, whether timezone is required for accurate date interpretation, and the behavior when no slots are available. For a simple tool it is minimally viable but leaves notable gaps.

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 already documents all parameters. The description adds only the concept of a 'date range,' which maps to startTime/endTime but does not enhance understanding beyond what the schema provides. Baseline 3 is appropriate.

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 'Get available booking time slots for a date range' clearly states a specific verb (Get) and resource (available booking time slots) with scope (date range). It naturally distinguishes itself from siblings like booking_create and view_portfolio.

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 implies the tool is for checking availability within a date range, which suggests a typical pre-booking step, but it does not explicitly state when to use it versus alternatives or provide exclusions. Sibling tool names hint at use cases but the description itself gives no direct guidance.

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