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

readOnlyHint=true already tells the agent this is a safe read, so the bar is lower; the description adds the underlying endpoint (GET /tenants/{tenantId}), which corroborates read-only semantics. It does not disclose behavior for a missing/unknown tenant_id or anything about the returned shape, so value beyond annotations is modest.

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?

Two short sentences, front-loaded with the action, with zero filler; the endpoint sentence is compact and useful for API-literate agents. Slightly under-specified rather than verbose.

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 one-parameter read-only lookup with no output schema, the description covers what the tool does and how it maps to the API. It omits what is returned and how errors manifest, which an agent would want before calling it, leaving it minimally viable rather than complete.

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% and the single parameter is documented with its provenance ('from the matching list tool'), so the schema carries parameter meaning. The description merely restates 'by id' and adds no format, prefix, or validation detail.

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 and resource ('Get one tenant by id') and maps it to the underlying REST endpoint, so an agent knows this is a single-resource read. It never explicitly names doorloop_list_tenants as the plural alternative, so sibling differentiation is only implicit in 'one tenant'.

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?

No when-to-use guidance is given beyond 'by id'; the description never says to use this after listing tenants or when not to use it. The routing hint ('from the matching list tool') lives in the schema, not the description, so the description itself offers no alternatives framing.

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