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

Annotations already declare destructive=true, idempotent=true and closed-world, so the safety bar is met. The description adds genuinely new context: identity and owner are immutable, and the write is versioned via expectedVersion — although it omits what happens on a version mismatch (conflict error vs. silent overwrite).

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 sentences, front-loaded with the action and scope, then a constraint. No filler or redundancy.

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, and annotations cover the safety profile. What remains thin is the geography object's structure and conflict behavior, but the essential picture of a replacement-based, version-checked mutation is present.

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 real meaning to expectedVersion (a concurrency guard) and names label and geography, but says nothing about the required nested referenceRelease, the addressText constraint, or the addressId format.

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: replace the label and geography of an owned address. It implicitly separates itself from createUserAddress/deleteUserAddress by scoping to an existing owned address, but never names a sibling to sharpen the boundary.

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?

Usage is implied by 'owned address' and 'expectedVersion', which points at an optimistic-concurrency update flow, but there is no explicit when-to-use versus alternatives such as createUserAddress or deleteUserAddress, and no stated preconditions (e.g. address must exist and be owned).

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