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

No annotations are provided, so the description carries the full behavioral burden. It does disclose a useful non-obvious trait — the returned key may be null — but says nothing about auth requirements, error behavior for an unknown nid, or whether the embedding is always present.

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 compact sentence, front-loaded with the operation and immediately following with the return shape. Nothing redundant, though the phrasing is terse enough to border on under-specification.

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 simple single-entity read with an output schema already documenting the return structure, the description is close to sufficient. Missing only failure-mode and auth context, which is minor given the tool's simplicity and the presence of an output 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?

Schema description coverage is 0% and the single parameter 'nid' is bare. The path template '{nid}' implicitly conveys that the argument is the node identifier, but no format or constraints are given, so the description adds only minimal meaning.

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+resource ('GET /nodes/{nid}') and clarifies it returns a single node, which distinguishes it from list_nodes/get_grid. It does not explicitly name a sibling, but the path template makes the single-entity scope unambiguous.

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: fetching one node by id versus listing nodes or fetching edges/grids. There is no explicit when-to-use statement, no mention of what to do if the node is absent, and no named alternative.

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