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

No annotations are provided, so the description carries the full burden of behavioral disclosure for a mutation. It does not state whether the address must currently be blocked, what happens on a non-blocked address, whether the operation is reversible or idempotent, or what permissions/auth are required (the auth nuance is only in the schema's tenant_key field).

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?

Three words, front-loaded and waste-free, but it is under-specified rather than genuinely concise. There is no structural element such as scope, side effects, or return behavior to anchor the agent.

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 no annotations and no output schema, the description should at least indicate effect and failure modes, but it does not. The schema covers parameters and the header-vs-tenant_key nuance, leaving the behavioral layer entirely undocumented.

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 100%, so the schema already documents both 'address' (the handle or t_... namespace) and 'tenant_key' (auth fallback with header precedence). The description adds nothing beyond that, so the baseline 3 applies.

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 ('Remove') and resource ('a block'), which an agent can read as the inverse of the sibling host.msg.block. However, it does not explicitly differentiate itself from that sibling or clarify what kind of block is being removed (messaging block assumed from the host.msg.* namespace).

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 guidance on when to unblock versus other recovery actions, no prerequisites, and no mention of the block counterpart it reverses. The agent must infer the use case entirely from the name.

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