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

Annotations already declare readOnlyHint=false, idempotentHint=false, and destructiveHint=false. Beyond that, the description adds the admin-only visibility constraint and explicitly warns that every successful call creates a new organization, which reinforces the non-idempotent behavior with concrete consequence. It doesn't discuss duplicate-name handling or failure modes, keeping it below a 5.

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, then access constraint, then return shape. The final sentence slightly overlaps idempotentHint=false but earns its place by stating the side effect plainly.

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 two-parameter mutation with no output schema, the description covers access requirements, parameter sourcing, return shape, and the create-on-every-call side effect. Only duplicate-name or conflict behavior is unaddressed.

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 100%, so both parameters are already documented, including the pattern and the list_organizations hint. The description restates 'its organization ID, and a client name' without adding format or sourcing detail beyond the schema, so the baseline 3 applies.

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 — 'Creates a client organization under an existing MSP' — which an agent can easily separate from create_domain and list_organizations. It never explicitly contrasts itself with those siblings, so it falls short of a 5.

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 gives real prerequisites (administrator access to the parent MSP, organization ID, client name) and notes it is only advertised to MSP admins. However, it offers no when-to-use or when-not-to-use guidance relative to alternatives, so usage is only implied.

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