Update the assignees of a GitHub issue or pull request. Provide repository details, issue number, and the new list of assignees to set responsibility.
Updates the assignees for a specific issue or pull request.
| Name | Required | Description | Default |
|---|---|---|---|
| assignees | Yes | ||
| repo_name | Yes | ||
| repo_owner | Yes | ||
| issue_number | Yes |
| Name | Required | Description | Default |
|---|---|---|---|
No arguments | |||
Changes observed during successful MCP inspections. Dates show when Glama detected each change.
v14.0.3v14.0.0v11.0.1v10.0.4v10.0.0Input schema / additionalPropertiesAdded value: +falseInput schema / properties / assignees / titleRemoved value: -"Assignees"Input schema / properties / issue_number / titleRemoved value: -"Issue Number"Input schema / properties / repo_name / titleRemoved value: -"Repo Name"Input schema / properties / repo_owner / titleRemoved value: -"Repo Owner"Input schema / titleRemoved value: -"update_assigneesArguments"Output schema / additionalPropertiesAdded value: +trueOutput schema / propertiesRemoved value: -{
- "result": {
- "additionalProperties": true,
- "title": "Result",
- "type": "object"
- }
-}Output schema / requiredRemoved value: -[
- "result"
-]Output schema / titleRemoved value: -"update_assigneesOutput"v1.0.0Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations indicate idempotentHint=true and readOnlyHint=false. The description does not contradict annotations but adds minimal behavioral context (e.g., no mention of overwriting behavior or auth requirements).
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?
Single sentence, no wasted words. However, it may be too terse for a tool with four parameters and no parameter descriptions.
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 mutation tool with four required parameters and no output schema details, the description is incomplete. It does not explain whether assignees are replaced or appended, nor does it specify scope (works for both issues and PRs directly).
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%, and the description provides no parameter-specific meaning beyond 'assignees for an issue/PR.' The four required parameters are not explained, leaving the agent to guess their purpose.
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 clearly states the tool updates assignees for issues or pull requests, using a specific verb and resource. It distinguishes itself from sibling tools like update_issue or create_issue.
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?
No guidance on when to use this tool versus alternatives (e.g., update_issue). No mention of prerequisites or context, leaving the agent to infer usage.
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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