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

No annotations are present, so the description carries full burden for behavioral disclosure. It reveals only that the tool registers an account, but does not explain side effects, idempotency, required permissions, whether IAM systems are modified, or what happens on duplicate registration. This is a significant transparency gap for a mutation tool.

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 a single, front-loaded sentence with no wasted words. However, given the tool has 13 parameters and no annotations or output schema, the description is under-specified and not appropriately sized; it is concise but not sufficiently informative.

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?

This is a registration tool with 13 parameters, no annotations, and no output schema. The description offers only a basic purpose statement and completely omits context around required inputs, behavior, and outputs. It falls short of what is needed for a tool of this complexity.

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?

With 0% schema description coverage, the description must compensate for documenting parameters, but it only vaguely hints at account_type values (privileged/service/shared) which are three of the five enum options. It does not clarify required fields like username, or the meaning of notes, owner, system, mfa methods, etc., leaving most parameters unexplained.

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 uses the specific verb 'Register' with the resource 'account' and the scope 'for IAM tracking'. This clearly distinguishes the tool from siblings like list_accounts (listing) and access_review (reviewing), and its intended action is unmistakable.

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 phrase 'Register a privileged/service/shared account' implies using this tool when adding an account for IAM tracking, but it does not explicitly state when to use it versus alternatives, nor does it mention any exclusions or prerequisites. Usage is implied rather than explicitly guided.

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