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

Annotations already declare destructiveHint=true and readOnlyHint=false, so the write/destructive profile is covered structurally. The description adds real value beyond that: it states the deletion is irreversible and explains the unblocking side effect on the waiting task, which is exactly the kind of consequence an agent needs before calling a destructive 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?

Two tightly packed sentences with zero filler; the destructive action and its consequence come first, and the confirmation precondition follows. Every clause carries information.

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-required-parameter destructive mutation with no output schema, the description covers irreversibility, the confirmation requirement, and the semantic effect of the deletion. It does not mention failure modes (e.g., relation not found) or auth requirements, which would round it out fully.

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% and the role enum is fully documented in the schema, so the baseline is 3. The description's reference to address fields 'as in the task's relations' loosely echoes the schema's role/key semantics but adds no new format or syntax detail.

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?

Names a specific verb (Deletes) and resource (a task relation) and identifies the three addressing fields, which distinguishes it cleanly from the sibling task_relation_update. An agent can tell exactly which operation this performs without opening the schema.

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?

Gives an explicit precondition: only at the user's direct request, after the user confirms what will be affected. It also explains the downstream effect of removing dependencies/blockedTasks. It stops short of naming the alternative tool (task_relation_update) for changing a relation instead of deleting it, so it is strong but not complete routing guidance.

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