# github_app_access

Diagnose GitHub App installation access and return browser setup links without scraping GitHub.

Canonical: https://commentary.dev/docs/reference/mcp/github-app-access

Diagnose GitHub App installation access and return browser setup links without scraping GitHub.

## Connect and discover

Connect an authenticated [MCP client](/docs/build/mcp). Call `tools/list` to confirm this tool is available to the current credential. Provider, workspace, and agent grants remain separate access checks.

## Input fields

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `action` | `"diagnose"` · `"start_install"` · `"list_installations"` | Yes | Operation to perform. Choose one advertised value; the remaining parameters are interpreted for that action. |
| `owner` | string | No | Repository owner or organization login. |
| `repo` | string | No | Repository name without the owner prefix. |
| `target` | string | No | Explicit source or repository destination used by the selected action. |
| `redirectTo` | string | No | Safe Commentary-relative destination to return to after GitHub App setup. |

## Call the tool

Send a `tools/call` request with `name: "github_app_access"` and an `arguments` object containing the required fields above. Choose an advertised action, then supply the fields required by that action. Do not treat a successful request as human approval or verified execution unless the returned contract explicitly records that fact.

## Errors and recovery

Read the returned error and permission requirements. Refresh stale revisions before conditional writes, retain idempotency keys only for exact retries, and reconnect when a credential has expired.

## Complete input contract

[Download the JSON schema](/docs/reference/mcp/github-app-access.json) for action-specific unions, nested fields, and validation constraints. This schema is generated from the same released definitions as the MCP endpoint. [Browse tools](/docs/reference/mcp-operations).