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

With no annotations provided, the description carries the full burden; it does usefully disclose a billing cost ('Costs 1 mcp_call'), which is real behavioral context an agent cannot get elsewhere. However, it says nothing about size limits, whether parsing can fail on malformed JSON, or what each mode returns, which leaves meaningful behavioral gaps for a no-annotation tool.

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?

A single compact sentence with the resource, mode list, path semantics and cost all front-loaded; no filler or repetition.

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 3-parameter tool with no annotations, no output schema, and zero schema description coverage, the description leaves too much unsaid: the required json_text field is never addressed, mode outputs are uncharacterized, and there is no indication of size limits or failure behavior.

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% — the schema only supplies titles like 'Mode' and 'Path'. The description compensates by enumerating the mode values (summary|schema|value|preview) and clarifying that path is an 'optional dotted path', which is genuinely more informative than the schema. It still says nothing about json_text or how path interacts with each mode.

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 ('Inspect') and resource ('large JSON') and enumerates the four operational modes, so the agent knows it is a JSON analysis tool rather than a fetch tool. It does not differentiate itself from any sibling, though no sibling appears to overlap with JSON inspection.

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 phrase 'large JSON' implies the intended scenario (bulk payloads too big to dump raw), but there is no explicit when-to-use / when-not-to-use guidance and no named alternative for smaller payloads or for retrieving JSON from storage (storage_read, storage_file_get).

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