cs_dbg_set_breakpoints
Set (replace) the breakpoints for a C# source file. Applied immediately if a session is running, else buffered until launch/attach. Feature-detected: the per-line conditions modifier is only sent when the connected adapter advertises supportsConditionalBreakpoints (netcoredbg does); on an adapter...
This record as markdown: /tools/breakpoint-mcp/cs-dbg-set-breakpoints.md
What cs_dbg_set_breakpoints does on Breakpoint
AI agents invoke cs_dbg_set_breakpoints to trigger actions in Breakpoint. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
| Parameter | Type | Required | Description |
|---|---|---|---|
path | string | Yes | C# script path (res://..., absolute, or relative to the C# project root) |
lines | array | Yes | 1-based line numbers |
conditions | array | — | Optional per-line condition expressions (aligned to lines, null to skip); break only when the expression is true |
Parameters from the server's own tool schema.
Why cs_dbg_set_breakpoints is rated High
This tool modifies the debugging state of a running or pending debug session by setting/replacing breakpoints, which directly affects execution flow of a program. It triggers external operations on a debug adapter (e.g., netcoredbg) and can influence program behavior immediately if a session is live. This is more than a simple write — it interacts with a live execution environment, qualifying as Execute.
From the tool's definition Set (replace) the breakpoints for a C# source file. Applied immediately if a session is running, else buffered until launch/attach.
Risk signalsAccepts file system path (path)
Attacks that exploit this kind of access
The rule that runs cs_dbg_set_breakpoints 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 cs_dbg_set_breakpoints, this is the rule to start with:
cs_dbg_set_breakpoints stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. 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 cs_dbg_set_breakpoints call is checked against it from then on.
Questions about cs_dbg_set_breakpoints
Set (replace) the breakpoints for a C# source file. Applied immediately if a session is running, else buffered until launch/attach. Feature-detected: the per-line conditions modifier is only sent when the connected adapter advertises supportsConditionalBreakpoints (netcoredbg does); on an adapter that advertises it unsupported the modifier is dropped and the result carries unsupported_modifiers plus a warning. Detection needs a live session, so set conditions after cs_dbg_launch/cs_dbg_attach. It is categorised as a Execute tool in the Breakpoint MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
cs_dbg_set_breakpoints accepts 3 parameters: path, lines, conditions. Required: path, lines. 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 cs_dbg_set_breakpoints: 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.
cs_dbg_set_breakpoints is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the cs_dbg_set_breakpoints 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 cs_dbg_set_breakpoints. 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.
cs_dbg_set_breakpoints 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.
More on Breakpoint, and thousands of servers like it.
Across the catalogue