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

Annotations already declare destructiveHint=true and readOnlyHint=false, but the description adds meaningful context beyond them: it is 'Irreversible', requires explicit user confirmation, and explains the side effect that removing dependencies/blockedTasks unblocks the waiting task. That unblocking consequence is genuinely non-obvious and high value.

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 dense sentences, front-loaded with the action, followed by the irreversibility/confirmation caveat. No filler, though the clause about roles is slightly compressed and could be clearer.

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 destructive mutation with no output schema, the description covers what is deleted, the side effect on blocked tasks, irreversibility, and the confirmation requirement. An agent has enough to call it correctly; only error/response behavior is left unstated.

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%, with each parameter described and role enumerated, so the schema already does the heavy lifting. The description only restates the three identifiers without adding syntax or semantics beyond the schema (e.g., it does not clarify that removal is directional). Baseline 3 is appropriate.

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 ('Deletes') and resource ('a task relation'), and identifies it precisely via key/otherKey/role. Clearly distinguishable from siblings task_relation_create and task_relation_update.

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?

Explicit when-to-use constraint: 'only at the user's direct request, after the user confirms what will be affected.' This is strong gating guidance. It does not, however, name the alternative (e.g., task_relation_update) for changing rather than removing a relation.

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