The Explore (search) agent description has been rewritten to be more precise about its limitations: it is now described as a "read-only search agent" that should NOT be used for "code review, design-doc auditing, cross-file consistency checks, or open-ended analysis" since it "reads excerpts rather than whole files and will miss content past its read window."
Evidence
New description string — search for "read-only search agent"
Strings lifted out of the shipped bundle, so the claim above can be checked against them.