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

Annotations already declare readOnlyHint=false, destructiveHint=false, and openWorldHint=false, so the safety profile is covered structurally. The description adds nothing beyond that: it does not say what setting INACTIVE actually does (e.g., whether it disables the key for live trading), whether the change is reversible, or whether elevated permissions are required.

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?

Two short fragments, no filler, purpose front-loaded before the endpoint. It is appropriately sized for what little it says, though the brevity reflects under-specification rather than disciplined editing.

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 mutation tool with a nested required body, a status enum, 0% schema description coverage, and no output schema, this description is far too thin. An agent cannot tell from it what values are valid, what the operation affects, or what it returns.

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 description compensates for none of it. The URL template hints that {id} is a path identifier, but the required 'body' object and its status enum (ACTIVE/INACTIVE) are never mentioned, leaving the enum semantics undocumented anywhere.

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 ('Update') and resource ('API key status') plus the underlying endpoint, so an agent knows this mutates an exchange API credential's status. It does not differentiate itself from near-identical siblings like put_api_prediction_id_status or put_bot_signal_cex_id_status, which is why it stops short of 5.

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 guidance, no prerequisites, and no mention of alternatives such as delete_api_exchange_id (removal) versus this status toggle. The agent must infer usage entirely from the name and endpoint.

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