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

Annotations already disclose that this is a write (readOnlyHint=false) and non-idempotent action, and the description usefully adds the 'verify first' caution. It still says nothing about reversibility, what happens to competing solutions, or what a repeated call does — gaps that matter for a non-idempotent mutation.

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 short sentences, front-loaded with the action and followed by the precondition; nothing is padded or redundant. It is efficient, though the brevity doubles as thin coverage rather than being a true strength.

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 state-changing acceptance action with no output schema, zero parameter documentation, and only minimal annotations, the description omits the consequences of the call (state change, notifications, irreversibility) and the meaning of its two inputs. An agent has to guess at the post-call behavior.

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 0% for two required integer parameters, so the description carries the full burden — but it never mentions problem_id or solution_id. It only loosely implies a problem/solution pairing through prose, which does not compensate for the undocumented parameters.

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?

The description names a specific verb and resource ('Mark the solution') and adds scope ('that solved YOUR problem'), so the core action is legible. However, it offers zero differentiation from the very close sibling 'confirm_solution', so an agent cannot tell the two apart from the text alone.

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?

'Only after you verified it works' supplies an explicit precondition, which is real timing guidance. But there is no statement of when NOT to use it and no alternative tool (e.g. confirm_solution, submit_solution) is named for the closely related cases.

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