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

With no annotations at all, the description carries the full load and does disclose the authorization model that matters most for a mutation: who can self-approve, that owner bearer keys 'cannot self-clear,' and that agent-owned self-approval escalates to GOVERN. It stops short of describing the resulting state change (what approval does to the cooldown), reversibility, or that a preliminary challenge call is needed before challengeId/walletSignature are supplied.

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?

Four short sentences, front-loaded with the action and then the caller-specific branches; there is no padding. It loses a point for dense unexplained jargon ('cooldown (early release)', 'GOVERN', 'self-clear') that slows parsing without adding precision.

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 an unannotated mutation tool with no output schema, the authorization coverage is good, but an agent still cannot predict the return value, whether approval is idempotent, or how to obtain the challenge that challengeId refers to. Adequate to avoid the worst mistakes, not complete enough to call confidently.

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% and each field is self-describing, so the baseline is 3. The description adds some framing by tying the funding-wallet signature to the agent-owned 'GOVERN' path, but it leaves the two-step challenge flow ambiguous — 'the first call' in the schema hints at a prior invocation the description never explains.

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 first sentence states a specific verb and resource with a qualifying condition: approving a recipient that is 'still in cooldown (early release).' That is enough to separate it from list_recipients, add_recipient, and remove_recipient at a glance, though it never names a sibling explicitly to draw the contrast.

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?

It gives real routing guidance: 'Active cosigners may approve directly,' human passkey owners must go through the FortFi app or email link, and agent-owned accounts take the governor/funding-wallet path. The main gap is that no alternative tool is named (e.g., approve_cosigner_action), so the agent must infer the boundary from the caller-type rules alone.

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