Category comparison
Static MCP manifest inspection vs live server probing
Compare offline manifest review with active MCP server testing, including evidence, risk, privacy, and when to use each approach.
- Published
- Reading time
- 7 minutes
Static inspection answers document questions
Static inspection can inventory tool metadata, commands, endpoints, roots, environment values, Unicode controls, and structural mismatches without trusting or contacting the target. It is appropriate before installation and safe to repeat in code review or CI when inputs are controlled.
Its evidence is bounded to the snapshot. It cannot establish endpoint identity, tool results, authorization, side effects, symlink resolution, or behavior that appears only after initialization.
Live probing answers behavior questions
Active testing can negotiate capabilities, call tools with controlled inputs, inspect errors, and observe authorization and side effects. That stronger behavioral evidence creates risk: the probe may transmit data, execute server code, mutate state, or alert an external service.
Use an isolated environment, synthetic data, disposable credentials, and explicit authorization. Do not point exploratory probes at production resources merely because a manifest scan looked clean.
Use the methods in sequence
Begin with static review to decide whether execution is justified and to design targeted tests. Then probe in a sandbox with the least privilege needed. Preserve both the reviewed manifest hash and runtime observations because either layer can change.
The methods are complementary, not competing safety scores. A static warning may direct a live test; a successful probe does not guarantee future remote behavior.
Frequently asked questions
Which method should come first?
Static inspection should generally come first because it can identify review targets without executing or contacting the server.
Does live probing prove a server is safe?
No. It provides evidence for tested behavior under specific conditions. Untested paths, future changes, and remote dependencies remain.