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frothkoetter

ranger-mcp-server

by frothkoetter

update_ranger_group

Update an Apache Ranger group by providing its ID and a JSON object with the new group details.

Instructions

Update a Ranger group from JSON. WRITE OPERATION

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
group_idYes
group_jsonYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

With no annotations provided, the description carries full burden for behavioral disclosure. It only states 'WRITE OPERATION' but does not describe whether the update is full or partial, idempotence, authentication needs, or any side effects. The impact of updating a managed group versus a custom group is unclear.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely short (two phrases), so it is concise but at the cost of missing essential information. It is not structured with sections or emphasis, but the brevity is not excessive—it could be longer to cover basics without being verbose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

While an output schema exists and the tool's purpose is clear, the description lacks completeness for a mutation tool with no annotations. It does not explain return values, error conditions, or how the output schema relates to the update. The agent has insufficient information to understand the full context.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, and the description adds no meaning to the parameters. 'group_id' and 'group_json' are named but not explained: e.g., what format the JSON must follow, required fields, or the effect of partial JSON. The agent cannot infer parameter usage from the tool description alone.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states 'Update a Ranger group from JSON' with a specific verb and resource, and the added 'WRITE OPERATION' emphasizes it as a mutation. This distinguishes it from siblings like create_ranger_group, delete_ranger_group, get_ranger_group, and list_ranger_groups.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives, such as create_ranger_group for new groups or update_ranger_policy for policies. There are no prerequisites or context about required permissions.

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

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