chore(tinytools): remove tinytools-std

AGENTS.md

@@ -61,10 +61,9 @@ is sufficient, whether a timeout applies, whether an external effect needs
 approval — it belongs to the host, whose threat model and configuration the
 decision depends on.
 
-`crates/tinytools-std` holds host-independent tool building blocks (cross-agent
-file staleness tracking, SSRF-safe URL validation, PATH probing, and the
-filesystem tools, which ask a host-implemented `FsGate` before they act). It is not part of the dependency-light vocabulary crate and may pull
-in `tokio`, `parking_lot` and `log`.
+This workspace contains shared tool definitions and call protocols only.
+Concrete tools and host-independent building blocks belong in their owning
+host or module repository.
 
 Add a crate by creating `crates/<name>/` — `members = ["crates/*"]` picks it up
 by existing. Inherit `version`, `edition`, `rust-version`, `license`, and