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

Annotations already declare destructiveHint=true and idempotentHint=true, so the description needs to explain what is destroyed or how acknowledgement state changes; it does neither. "Privacy-filtered project metadata" is unexplained and adds no operational context such as auth requirements, side effects, or what a stale expectedVersion implies.

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?

A single sentence with no filler, and the verb leads. It is efficient, if only because it says so little; nothing is padded or buried.

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 eight required parameters, a destructive annotation, no output schema, and a version-conflict parameter, one vague sentence is far from sufficient. The description leaves the agent without the mutation semantics, the acknowledgement effect, or any notion of what success 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 description coverage is high (~88%), so the baseline is 3, and the description adds nothing about the eight required parameters. This is generous given that five parameters (taskId, controlId, projectId, sessionId, executionId) carry identical boilerplate "Owned project ID" text that is almost certainly wrong.

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?

It gives a verb ("Update") and a resource ("acknowledge instruction control"), but the resource is dense internal jargon and the verb conflicts with the tool's own name, which implies an acknowledge action rather than an update. An agent cannot confidently tell it apart from siblings like control_instruction_task or submit_node_instruction.

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 statement of when to use this tool, when not to, or which sibling handles the adjacent case (e.g. queue_instruction_tasks vs control_instruction_task). The one clause about "privacy-filtered project metadata" gestures at a constraint but gives no actionable condition.

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