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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered by structured data. The description adds nothing beyond that — no note on behavior for missing/invalid ids, no error semantics, no indication of what a 'Nod' contains.

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?

At four words the text is front-loaded but under-specified rather than concise; it omits the verb and any context. Brevity here reflects a missing description rather than efficient writing.

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?

An output schema exists, so return values need not be explained, and the tool is structurally simple. Still, for a domain-specific resource ('Nod') the description gives an agent nothing about what is returned or how failures behave, leaving it thinner than the tool's minimal complexity warrants.

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?

There is a single parameter, id, and the schema already pins it to a UUID format with a strict pattern. The description's 'by id' merely restates the parameter name and adds no meaning about where the id comes from or what happens if it is malformed.

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 phrase 'One Nod by id' implies a single-record retrieval keyed by identifier, and the title 'Read one Nod' confirms the read verb. However, the description never states the verb itself and never distinguishes this from list_nods or get_* siblings, so an agent must infer that this fetches exactly one record rather than a collection.

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 guidance on when to use this versus list_nods or the other get_* tools, and no mention of prerequisites such as needing a valid existing id. The only implicit signal is 'by id', which the schema already conveys.

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