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

Annotations mark this as a non-destructive write (readOnlyHint=false, destructiveHint=false). Beyond that, the description adds meaningful behavioral detail absent from annotations: editing the file later doesn't change what was agreed, and agreement is only complete once every party agrees to the same version. It stops short of covering error/failure behavior, so 4.

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?

The description is front-loaded with the core action and then clarifies the decision-file variant. It is a bit long and lightly repetitive across the two paragraphs, but each sentence carries substantive meaning.

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?

With no output schema and only partial annotation coverage, the description does the heavy lifting of explaining what a successful agreement means (baseline/landing) and the immutability semantics. It omits auth flows and failure modes, so it is strong but not fully complete.

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%, so the baseline is 3. The description restates that path points to a deal or decision file and that agreement targets its current version, adding slight framing but no format or syntax beyond what the schema already documents.

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 states a specific verb (agree) bound to a specific resource (the current version of a deal or decision file) and explains what agreement produces (a baseline). The tool name 'agree' is vague on its own, but the description removes ambiguity about the object being agreed to. It doesn't explicitly contrast with siblings like accept_forest_offer or confirm_offchain_payment, keeping it at 4.

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?

The description explains the semantics of agreement and when the result 'lands' as a decision, which implies the usage context. However, it never states when to use this tool versus alternatives, nor prerequisites such as authentication or required party state. Usage is inferable rather than guided.

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