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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false, so the safety profile is covered. The description adds genuinely new context by explaining the post-deletion behavior — the agent falls back to asking again per the defaults — which is not expressed in any structured 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?

One compact sentence plus the endpoint, with the verb and resource front-loaded. The trailing clause about the agent asking again is slightly compressed and reads awkwardly, but no sentence is wasted.

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 two-parameter delete tool with rich annotations, the description covers purpose, identifier provenance, and the observable consequence of deletion. Missing auth/permission requirements and failure behavior are minor given the annotation coverage and the absence of an output schema.

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 100%, so both email and permissionId are already documented, including the note that permissionId comes from muse_get_permissions. The description's endpoint path restates those same parameters without adding format, validation, or edge-case detail, so the baseline of 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 and resource ('Delete one permission rule') and identifies where the identifier comes from ('from muse_get_permissions'), which distinguishes it from muse_set_permission_rule and muse_set_permission_defaults. It stops short of explicitly naming the sibling to use instead when the intent is to modify rather than remove.

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 explicit when-to-use or when-not-to-use guidance and no routing to alternatives such as muse_set_permission_rule. The clause about the agent asking again next time describes the consequence of deletion, not the conditions under which this tool should be selected.

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