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

Annotations already declare readOnly=false, destructive=false, openWorld=false, confirming a safe partial write. The description adds two things they don't cover: partial-update semantics ('Only fields supplied are changed') and the required auth token (NOMADSTAYS_MCP_AGENT_TOKEN). It stops short of describing the response or permission scope.

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?

Three tight sentences, front-loaded with the purpose, followed by the partial-update behavior and the auth requirement. Every sentence earns its place, though it could be marginally leaner.

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?

No output schema exists, and the description omits any return-value information. For a mutation tool with 18 mostly undocumented parameters, the partial-update and auth notes are helpful but incomplete; field-level detail is left to an under-covering schema.

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?

With only 28% schema description coverage across 18 parameters, the schema leaves most fields undocumented (e.g. tikTok, ownerMobile, bookingPhone have no descriptions). The description only names high-level categories (contact/owner/manager, social links) and adds no field-level meaning, so it does not compensate for the coverage 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?

States a specific verb (Update) and resource (a Stay's contact/owner/manager details and social media links), which is concrete enough to distinguish it from generic updateStayDetail or updateHostBusinessProfile. It does not, however, explicitly name those siblings, so routing is left slightly to inference.

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?

There is no when-to-use or when-not-to-use guidance and no mention of alternatives such as updateStayDetail, which handles other Stay fields. Usage is only implied by the purpose, and for a tool with several overlapping 'update Stay' siblings that gap matters.

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