gd_call_hierarchy
Find the callers (direction=incoming, the default) or callees (direction=outgoing) of the function at a position. Resolves the symbol with textDocument/prepareCallHierarchy, then callHierarchy/incomingCalls or outgoingCalls, and returns each related function with the call-site ranges. Read-only. ...
This record as markdown: /tools/breakpoint-mcp/gd-call-hierarchy.md
What gd_call_hierarchy does on Breakpoint
AI agents call gd_call_hierarchy to retrieve information from Breakpoint without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
line | integer | Yes | 0-based line |
path | string | Yes | Script path (res://..., absolute, or project-relative) |
character | integer | Yes | 0-based character |
direction | string | — | incoming = who calls this (default); outgoing = what this calls |
Parameters from the server's own tool schema.
Why gd_call_hierarchy is rated Low
This tool performs static analysis queries on code structure to find function call relationships. It uses textDocument/prepareCallHierarchy and callHierarchy/incomingCalls/outgoingCalls - all read-only language server protocol operations that retrieve data without side effects. No data is created, modified, deleted, or executed. The explicit 'Read-only' designation confirms this is a retrieval operation.
From the tool's definition Tool description explicitly states 'Read-only' and describes querying call hierarchy relationships (finding callers/callees) using language server protocol calls that retrieve information without modification.
Risk signalsAccepts file system path (path)
Attacks that exploit this kind of access
The rule that runs gd_call_hierarchy safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Breakpoint, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For gd_call_hierarchy, this is the rule to start with:
gd_call_hierarchy is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Breakpoint, apply this rule, and every gd_call_hierarchy call is checked against it from then on.
Questions about gd_call_hierarchy
Find the callers (direction=incoming, the default) or callees (direction=outgoing) of the function at a position. Resolves the symbol with textDocument/prepareCallHierarchy, then callHierarchy/incomingCalls or outgoingCalls, and returns each related function with the call-site ranges. Read-only. Godot's GDScript language server does not advertise callHierarchyProvider through 4.7; feature-detected. It is categorised as a Read tool in the Breakpoint MCP Server, which means it retrieves data without modifying state.
gd_call_hierarchy accepts 4 parameters: line, path, character, direction. Required: line, path, character. The full parameter table on this page comes from the server's own tool schema.
Register the Breakpoint MCP server in PolicyLayer and add a rule for gd_call_hierarchy: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Breakpoint. Nothing to install.
gd_call_hierarchy is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the gd_call_hierarchy rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for gd_call_hierarchy. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
gd_call_hierarchy is provided by the Breakpoint MCP server (breakpoint-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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