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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered, and the description adds that the output is deterministic and includes a checksum. However it does not state the sorting rules (key ordering, whether array order is preserved) or the checksum encoding, which are the behaviors that actually matter here.

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 sentence, front-loaded with the result, with zero filler. Nothing is redundant or buried.

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?

With no output schema, the description must explain the return value; it names both parts (sorted JSON, SHA-256 checksum) but leaves format details unspecified. For a utility this small it is nearly adequate, though the sorting and checksum encoding gaps are real.

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% for the single required 'value' parameter, so the description carries the full burden and adds nothing: it never says what 'value' accepts or how non-string types are handled. The union type in the schema is the only clue that any JSON value is allowed.

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 result: deterministically sorted JSON plus its SHA-256 checksum. That is enough to distinguish it from siblings like privi_json_merge_preview or privi_payload_hash, though the description never names an alternative explicitly.

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 when canonicalization is preferable to e.g. hashing a raw payload. The agent must infer the use case (stable comparison, idempotency keys) from the name alone.

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