# Author: Sandeep Belgavi. Synthetic exercise; no network or provider calls.
import hashlib,json
allowed={"policy_search","order_read"}
agent={"name":"refund_reviewer","revision":1,"tools":["policy_search","order_read"]}
assert set(agent["tools"]) <= allowed
encoded=json.dumps(agent,sort_keys=True,separators=(",",":"))
assert len(hashlib.sha256(encoded.encode()).hexdigest())==64
assert not {"shell_execute"} <= allowed
print("definition accepted; unknown tool rejected")