evaluate_expression

MCP tool from MCP Debugger by debugmcp

Evaluate expressions in debug context

How to use it

Project documentation lists evaluate_expression for the MCP Debugger MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), then check which tools your installed version makes available. Tool availability can depend on configuration and credentials. A server handshake does not verify this tool’s behavior. See the full listing for setup details.

Install MCP Debugger

$docker run -v $(pwd):/workspace debugmcp/mcp-debugger:latest
FULL MCP DEBUGGER LISTING

Other tools in MCP Debugger (27)

attach_to_process

Attach debugger to a running process

clear_breakpoints

Remove all breakpoints (optionally per file)

close_debug_session

Close a session

continue_execution

Continue running

create_debug_session

Create a new debugging session

detach_from_process

Detach debugger from a process

expose_session

Open a read-only DAP mirror endpoint so an IDE can attach and inspect

get_local_variables

Get local variables in current frame

get_output

Read captured debuggee output (stdout/stderr)

get_scopes

Get variable scopes for a frame

get_source_context

Get source code context

get_stack_trace

Get the current stack trace

get_variables

Get variables in a scope

list_breakpoints

List a session's breakpoints with verified state

list_debug_sessions

List all active sessions

list_supported_languages

Show available language adapters

list_threads

List all threads in the debug session

pause_execution

Pause running execution

redefine_classes

Hot-swap changed Java classes into a running JVM (Java only)

remove_breakpoint

Remove a breakpoint by id or file+line

restart_debugging

Relaunch with the same config, breakpoints re-applied

set_breakpoint

Set a breakpoint in a file

start_debugging

Start debugging a script

step_into

Step into a function

step_out

Step out of a function

step_over

Step over the current line

unexpose_session

Close the mirror endpoint and disconnect IDE clients