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

With no annotations, the description carries the burden and discloses that the operation is HIGH_WRITE, hard-blocked, and requires confirm=true. The note about the under-documented bulk-delete body shape also tells the agent to verify the request shape before first use, which is a useful caveat. It does not mention response behavior or reversibility, but the safety-relevant traits are covered.

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 compact and front-loaded: action and safety requirement appear in the first sentence, with a focused caveat in the note. Every sentence adds value, and the note earns its place by flagging documentation uncertainty.

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 tool is a mutating operation with no annotations and no output schema, so the description should describe the result or failure behavior; it does not. It does provide necessary safety and endpoint context, but an agent still lacks information about what happens when confirm=false or what a successful removal 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 coverage is 0%, but the description compensates by tying 'entries' to emails/domains and overriding the schema's confirm default with 'always requires confirm=true.' It does not explicitly map 'entries' to the noted 'bl_values' array or specify exact string formats, but the core semantics are provided.

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 uses a specific verb and resource: 'Remove emails/domains from the blocklist.' This unambiguously distinguishes the tool from its siblings add_to_blocklist and list_blocklist, despite not naming them.

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 gives clear usage context by labeling the operation HIGH_WRITE, hard-blocked, and by stating that it 'always requires confirm=true,' so an agent knows the mandatory precondition. It does not explicitly contrast with add/list alternatives or state when not to use it, so it falls just short of a 5.

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