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Sweep 22 Sep 2026 · 15:52Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
Writing the changelog v2.1.280 merge candidates · 1/5
HomePromptsv2.1.269
Tool descriptions

v2.1.269, every tool

Agent SDK, print mode. 17 tools, as the client described them to the model in this release. Where a tool has more than one description the difference is usually a single interpolated string.

These are the tools of the system reminder: toolsearch deferred request, not of the ordinary one. The injected-prompt ledger lists every surface the rig reaches.

Tools17in this capture, on this arm
Moved0since the previous capture on this arm
Whole capturev2.1.269the system prompt and what moved

Every description, as sent

17 ◆ moved since the previous capture on this arm, ○ byte-identical to it.
Press / to filter
ToolOpens withDescriptionCopiesMoved
Agent Launch a new agent to handle complex, multi-step tasks. 1,434 chars 1 copy ○same
Bash Executes a bash command and returns its output. 1,229 chars 1 copy ○same
DeferredToolPlaceholder Reserved placeholder that keeps deferred tool loading active; never call this tool. 83 chars 1 copy ○same
Edit Performs exact string replacement in a file. 360 chars 1 copy ○same
ListAgents Lists agents you can SendMessage to — in-process subagents you spawned, the teammates on your team, other local Claude... 777 chars 1 copy ○same
NotebookEdit Replaces, inserts, or deletes a single cell in a Jupyter notebook (.ipynb file). 619 chars 1 copy ○same
Read Reads a file from the local filesystem. 790 chars 1 copy ○same
ReportFindings Report code-review findings as a typed list so the host UI can render them. 574 chars 1 copy ○same
ScheduleWakeup Schedule when to resume work in /loop dynamic mode — the user invoked /loop without an interval, asking you to... 3,396 chars 1 copy ○same
SendMessage # SendMessage Send a message to another agent. 3,386 chars 1 copy ○same
Skill Invoke a skill. 1,417 chars 1 copy ○same
TaskStop - Stops a running background task by its ID - Takes a task_id parameter identifying the task to stop - To stop an... 378 chars 1 copy ○same
ToolSearch Fetches full schema definitions for deferred tools so they can be called. 953 chars 1 copy ○same
WebFetch Fetches a URL, converts the page to markdown, and answers `prompt` against it using a small fast model. 469 chars 1 copy ○same
WebSearch Search the web. 312 chars 1 copy ○same
Workflow Execute a workflow script that orchestrates multiple subagents deterministically. 3,480 chars 1 copy ○same
Write Writes a file to the local filesystem, overwriting if one exists. 240 chars 1 copy ○same