> ## Documentation Index
> Fetch the complete documentation index at: https://docs.graphify.com/llms.txt
> Use this file to discover all available pages before exploring further.
# MCP tool reference
> Inputs for all ten Graphify graph and pull request tools.
The current graph MCP server exposes ten tools. Connect it with the [MCP setup guide](/mcp/overview).
Every tool also accepts an optional `project_path`: an absolute path to a project directory containing `graphify-out/graph.json`. Omit it to use the graph selected when the server started. Access is subject to the server’s path controls.
These schemas were extracted from the audited `graphify/serve.py` source. Graph exploration returns saved evidence. PR tools additionally use GitHub context; MCP triage returns data for your assistant to reason over.
## query\_graph
Search the knowledge graph using BFS or DFS. Returns relevant nodes and edges as text context.
| Input | Type | Required | Default / description |
| ---------------- | --------- | -------- | ------------------------------------------------------------------------------------ |
| `question` | `string` | Yes | Natural language question or keyword search |
| `mode` | `string` | No | Default: `"bfs"`. bfs=broad context, dfs=trace a specific path Values: `bfs`, `dfs`. |
| `depth` | `integer` | No | Default: `3`. Traversal depth (1-6) |
| `token_budget` | `integer` | No | Default: `2000`. Max output tokens |
| `context_filter` | `array` | No | Optional explicit edge-context filter, e.g. \['call', 'field'] |
## get\_node
Get full details for a specific node by label or ID.
| Input | Type | Required | Default / description |
| ------- | -------- | -------- | --------------------------- |
| `label` | `string` | Yes | Node label or ID to look up |
## get\_neighbors
Get all direct neighbors of a node with edge details.
| Input | Type | Required | Default / description |
| ----------------- | --------- | -------- | ---------------------------------- |
| `label` | `string` | Yes | Optional. |
| `relation_filter` | `string` | No | Optional: filter by relation type |
| `token_budget` | `integer` | No | Default: `2000`. Max output tokens |
## get\_community
Get all nodes in a community by community ID.
| Input | Type | Required | Default / description |
| -------------- | --------- | -------- | ---------------------------------- |
| `community_id` | `integer` | Yes | Community ID (0-indexed by size) |
| `token_budget` | `integer` | No | Default: `2000`. Max output tokens |
## god\_nodes
Return the most connected nodes - the core abstractions of the knowledge graph.
| Input | Type | Required | Default / description |
| ------------------------- | --------- | -------- | -------------------------------------------------------------------------------------------------------------------------- |
| `top_n` | `integer` | No | Default: `10`. |
| `exclude_hubs_percentile` | `number` | No | Suppress nodes whose degree exceeds this percentile (0-100) of the degree distribution, matching cluster()'s hub exclusion |
## graph\_stats
Return summary statistics: node count, edge count, communities, confidence breakdown.
No required inputs. Call with `{}` for the default graph.
## shortest\_path
Find the shortest path between two concepts in the knowledge graph. Follows stored edge direction by default; set undirected=true to ignore it.
| Input | Type | Required | Default / description |
| ------------ | --------- | -------- | ------------------------------------------------------------- |
| `source` | `string` | Yes | Source concept label or keyword |
| `target` | `string` | Yes | Target concept label or keyword |
| `max_hops` | `integer` | No | Default: `8`. Maximum hops to consider |
| `undirected` | `boolean` | No | Default: `false`. Ignore stored edge direction when searching |
## list\_prs
List open GitHub PRs with CI status, review state, and graph impact (which communities each PR touches, blast radius). Use this before starting work to check if a PR already covers the area you're about to change.
| Input | Type | Required | Default / description |
| ------ | -------- | -------- | ------------------------------------------------------- |
| `base` | `string` | No | Base branch to filter PRs by (auto-detected if omitted) |
| `repo` | `string` | No | GitHub repo (owner/repo). Defaults to current repo. |
## get\_pr\_impact
Get detailed graph impact for a specific PR: which files it changes, which knowledge-graph communities are affected, and how many nodes are touched. Use this to assess merge risk or check for overlap with your current work.
| Input | Type | Required | Default / description |
| ----------- | --------- | -------- | --------------------------------------------------- |
| `pr_number` | `integer` | Yes | PR number to analyse |
| `repo` | `string` | No | GitHub repo (owner/repo). Defaults to current repo. |
## triage\_prs
Return all actionable open PRs (correct base, not stale) with full graph impact data so you can reason about review priority, merge order, and conflict risk. Call this when the user asks 'what PRs should I review?' or 'what's ready to merge?'
| Input | Type | Required | Default / description |
| ------ | -------- | -------- | ------------------------------------------------------- |
| `base` | `string` | No | Base branch to filter PRs by (auto-detected if omitted) |
| `repo` | `string` | No | GitHub repo (owner/repo). Defaults to current repo. |
## Example calls
```json query_graph theme={null}
{"question": "request validation", "mode": "bfs", "token_budget": 1500}
```
```json shortest_path theme={null}
{"source": "login", "target": "normalize_email", "max_hops": 8}
```
The second example uses the [tutorial project](/guides/first-graph). Replace labels with nodes from your graph. A returned path is source-level context, not proof of runtime execution.