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github-org-mcp

by MSPbotsAI

github_set_org_membership

Add a user to a GitHub organization or update their role. Sends an invitation if the user is not yet a member, otherwise updates their role between member and admin.

Instructions

Add a user to the organization or update their role.

    If the user is not yet a member, GitHub sends an invitation (state "pending");
    if they already are a member, their role is updated.

    Args:
        username: The GitHub handle of the user to add or update.
        role: Role to assign — "member" or "admin" (default: "member").
    

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
roleNomember
usernameYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior3/5

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

With no annotations, the description carries the transparency burden. It discloses key behavior (invitation for new users, role update for existing members) and indicates the 'pending' state, which is useful. However, it omits permission requirements, potential errors, or side effects, so it is only minimally adequate.

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

Conciseness5/5

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

The description is compact and front-loaded with the core action. The behavioral note and Args block are clearly separated and add necessary information without redundancy or fluff.

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

Completeness4/5

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

For a simple 2-parameter tool with an output schema, the description is largely complete: it explains behavior, parameters, and defaults. It does not mention edge cases (e.g., user not found) or permission requirements, but these are not essential given the tool's simplicity.

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

Parameters5/5

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

Although the schema has no descriptions, the description's Args section fully documents both parameters: username ('GitHub handle') and role (allowed values 'member' or 'admin' plus default). This fully compensates for the 0% schema coverage.

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 opens with a specific verb+resource statement: 'Add a user to the organization or update their role.' This clearly differentiates from sibling tools like list/get/remove, and the added detail about invitation vs. role-update behavior further distinguishes it from create_org_invitation.

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

Usage Guidelines4/5

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

The description clearly implies the tool is used for adding or updating org membership, and the behavioral note about invitations vs. updates gives context. However, it does not explicitly state when NOT to use this tool or mention alternatives like create_org_invitation, so it falls short of a 5.

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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