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

No annotations are provided, so the description carries the full disclosure burden. It does communicate the return content (endpoint list plus corresponding MCP tool), which is the key behavioral fact. However, it never states that the operation is read-only and side-effect free, nor anything about size, format, or whether the list is static — gaps that matter given zero annotation coverage.

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?

One sentence, front-loaded with the verb and the resource, with the useful clarifying detail (endpoint-to-MCP-tool mapping) placed immediately after. No filler, no redundancy.

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, read-only reference tool with no output schema, the description covers what the agent needs: what comes back and what the mapping means. A brief note on read-only nature or output format would close the remaining gap, but the definition is essentially complete for this complexity level.

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 takes zero parameters, so there is nothing for the description to disambiguate; the baseline for a no-param tool applies. The description correctly implies no inputs are needed by describing a fixed reference lookup.

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 gives a specific verb and resource ('Returns a concise reference of all Druk Asia v1 API endpoints') and adds that each endpoint is mapped to its wrapping MCP tool. That is clearly distinguishable from every sibling, which are domain operations (create_booking, list_destinations, etc.). It stops short of explicitly naming itself as the discovery/meta tool, so a 4 rather than a 5.

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?

Usage is only implied: an agent must infer that this is the tool to call when it needs to discover what endpoints or MCP tools exist. There is no explicit 'use this when you need to map an API endpoint to a tool' statement, no exclusions, and no mention of the sibling tools as alternatives. Adequate but leaves the routing decision to inference.

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