json_set

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

No annotations are provided, so the description carries full burden. It fails to disclose whether the tool creates the key if missing, whether intermediate paths are created, or what happens if the path does not exist. It only mentions return type generically ('success or error'). For a mutation tool, these are critical behavioral traits.

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?

The description is concise with a clear opening sentence followed by an Args list. It is front-loaded with the core action. Each sentence adds value, though the Args section could be slightly more compact.

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?

The description covers essential inputs and purpose but lacks details on behavior for edge cases (missing key, invalid path). An output schema exists but is not described. For a 4-parameter tool with no annotations, it is partially complete but leaves gaps.

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 input schema has 0% description coverage, so the description's Arg section adds meaning for all four parameters. It explains name, path, value, and expire_seconds, going beyond the bare schema types.

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 clearly states the tool sets a JSON value in Redis at a given path with an optional expiration. It uses a specific verb-resource pair (set JSON value) and distinguishes from siblings like json_get, json_del, and set (which handles whole keys).

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?

The description provides no guidance on when to use this tool vs alternatives. It does not mention that it modifies a specific JSON path within a document, unlike set which replaces the entire value, or json_del which removes a path. No when-not or alternative recommendations.

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