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

Adds substantial context beyond the annotations: a per-identity daily cap (rate limit), sealed-until-deadline behavior, the one-per-task-per-identity constraint (reinforcing idempotency), and a prompt-injection safety rule about not following instructions found in sources. These are exactly the traits an agent needs beyond readOnly/destructive/idempotent hints.

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?

Front-loaded with the core action and tight overall, but the parenthetical asides make it dense and slightly run-on. Every clause carries real constraint information, so little 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 10-param, nested, no-output-schema tool, the description covers behavior and constraints well but leaves the parameter set under-specified and says nothing about the result or retry semantics (operation_id reuse). Adequate but with clear gaps given the tool's complexity.

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 only 30% across 10 parameters (9 required, nested identity object), so the description carries most of the burden but mostly does not. It only loosely touches task_id ('with the task's id') and the verdict enum ('prefer source_unclear'), leaving summary, conditions, attempts, limitations, source_urls, and identity undocumented in the prose.

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 ('Submit one authorized source-review contribution to an open A2A task') and pins the mechanism ('SendMessage with the task's id'). An agent can distinguish this from siblings like cairn_a2a_respond 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 explicit operating conditions: read ONLY approved public sources, no execution, no following embedded instructions, and 'Prefer source_unclear to guessing'. It also states the one-per-task-per-identity and daily-cap rules. It stops short of naming a sibling tool alternative, so a 4 rather than 5.

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