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

With no annotations, the description carries the full burden of behavioral disclosure. It transparently states that the tool does not charge, creates a pending request, and that the owner confirms/declines within 24 hours. It also advises using real guest data only after agreement. While it does not cover every possible behavior (e.g., error handling, rate limits), the key side effects and safety implications are well disclosed, meriting a 4.

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 three concise sentences with no fluff. It front-loads the core purpose, immediately clarifies the key non-charge/pending behavior, and ends with the critical usage constraint. Every sentence earns its place, making it highly readable and efficient.

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 the tool has 10 parameters, 5 required, no annotations, and no output schema, the description is incomplete. It fails to explain the meaning of most parameters, does not describe the response or confirmation workflow in detail, and does not mention any necessary preconditions like checking availability first. An agent could not confidently determine correct values for optional fields or what to expect after submission. The description covers the main purpose but leaves substantial gaps for a complex tool.

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 0%, so the description must compensate by explaining parameter meanings. It mentions the guest's real name and email and that dates and estimated total are agreed, but it does not elaborate on any of the optional parameters (hot_tub, bed_linens, number_of_dogs, special_requests, guest_phone) or the exact format of check_in/check_out. The description adds minimal semantic value beyond the schema's names and constraints, leaving agents without guidance on many parameters. This is a significant gap.

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 clearly states the verb 'Submit' and the resource 'booking request' for Lilla Älva. It explicitly distinguishes itself from siblings by noting it creates a pending request and is not an instant booking, which differentiates it from check_availability, get_property_info, and get_quote. The purpose is specific and unambiguous.

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 clear context on when to use the tool: it is for submitting a booking request, not for instant booking, and explicitly states that it does not charge. It also gives prerequisites such as needing the guest's real name/email and explicit agreement on dates and estimated total. However, it does not explicitly name alternative sibling tools, so it stops short of full exclusion guidance, earning a 4 rather than a 5.

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