Guard

High-level verification API. Wraps the constraint engine with a simple check/block interface.

Module: munio.guard

`Guard`

Unified tool call security for Python agent frameworks.

Usage::

guard = Guard(constraints="generic")

# Check an action
result = guard.check(Action(tool="http_request", args={"url": "..."}))


# Universal decorator
@guard.verify()
def call_tool(url: str, method: str = "GET"):
    return requests.get(url)

Args: constraints: Constraint pack name (default: “generic”). mode: Verification mode (enforce, shadow, disabled). config: Full ConstraintConfig (overrides constraints/mode if provided). registry: Pre-built ConstraintRegistry (for testing; skips disk loading). constraints_dir: Path to constraints directory (overrides config default).

Parameters:

Name	Type	Default
`constraints`	`str`	’generic’
`mode`	`VerificationMode`	VerificationMode.ENFORCE
`config`	`ConstraintConfig	None`
`registry`	`ConstraintRegistry	None`
`constraints_dir`	`Path	str
`temporal_store`	`TemporalStore	None`

Fields:

Name	Type	Description
`verifier`	`Verifier`	Access the underlying Verifier (for advanced use/testing).

Methods:

check(action) -> VerificationResult Verify an action and return the result (does not raise on violations).
acheck(action) -> VerificationResult Verify an action asynchronously (does not raise).
verify(constraints) -> Callable[..., Any] Universal decorator for verifying function calls.

`ActionBlockedError`

Raised when a decorated function is blocked by constraint verification.

Attributes: result: The VerificationResult that caused the block.

Parameters:

Name	Type	Default
`result`	`VerificationResult`

Fields:

Name	Type	Description
`result`	“

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