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

Annotations already declare the safety profile (readOnly=false, destructive=true, idempotent=true), and the description adds real context beyond them: no external action is performed, idempotency key must be stable, exact-intent confirmation is required, and updates must use the current revision. This is meaningful disclosure for a mutation-style tool. There is mild tension between "no external action is performed" and destructiveHint=true, but the revision requirement explains the destructive/overwrite risk rather than contradicting it.

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 tight sentences, no filler, with the most important constraint (no external action) placed early. The dense, compliance-flavored phrasing slows comprehension slightly, but every sentence carries information.

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?

An output schema exists, so return values need not be explained. The description covers the workflow position (prepare-before-approve/execute), prerequisites, idempotency, and update semantics, which is what an agent needs to invoke it correctly. The nested payload contents remain uncharacterized, which is the main residual gap.

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%, so the description must carry the load. It gives useful semantics for idempotency_key ("stable idempotency key") and confirmation_token ("exact-intent confirmation"), but says nothing about project_id or the nested data payload (title/evidence). Partial compensation for an undocumented schema.

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 ("Prepare") and a concrete resource ("a durable action retaining supplied completion evidence"), and it explicitly distinguishes itself from the later steps by saying "after separate approval and execution." An agent can tell this apart from founder_ops.execute_action and founder_ops.approve_action, though the phrasing is jargon-heavy rather than plainly stated.

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 clear context: this is a preparation/staging step, no external action occurs, and it should only be used after approval and execution-related steps. It also states the prerequisite tier and consent requirements. It stops short of naming the sibling tools (approve_action, execute_action) that must precede it, so the routing is implied rather than explicit.

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