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

The description adds substantial behavioral constraints beyond the annotations: do not invent facts, stay neutral between fleets, copy id_boat and id_tbf1 exactly, clarify missing years, and never generalize availability to other dates. These are meaningful operational rules for the agent. The annotations already establish read-only and idempotent behavior, and the description does not contradict them.

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 content is a structured numbered list with the most important constraints near the top. Each item appears to earn its place as actionable guidance, though some entries are longer than necessary. Overall it is organized and reasonably front-loaded.

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 zero-parameter guidance tool with no output schema, the description supplies a fairly complete set of behavioral rules. It covers fact sourcing, neutrality, call ordering, identifier handling, date clarification, media retrieval, and availability scope. It does not explain what the tool returns, but with no output schema that is less critical.

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 has zero parameters, so parameter semantics are inherently simple and the schema coverage is 100%. The description does not need to explain parameter meaning, and it correctly does not introduce any. Baseline 4 applies for a no-parameter tool.

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 opens with 'Sedna guidance for public yacht-search conversations,' which is more of a topic label than a specific tool action. It never states a verb like 'returns' or 'provides guidance text,' and it does not distinguish this readme tool from the search, booking, or detail siblings. An agent can infer it is a guidance document, but the purpose is not crisply defined.

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 numbered rules give clear operational context, such as calling Base_list before search_boats and using boat_details for media. However, they do not explicitly say when to call the readme tool itself versus when to skip it, nor do they state exclusions or alternatives for this guidance tool. Usage is therefore implied rather than specified.

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