Silo

Interface: AgentToolCall ​

Defined in: packages/sdk/src/agents-service.ts:719

Beta

One tool call an agent is making, carried by a tool_call (the call opening) or a tool_call_update (a change to one already open) — see AgentSessionUpdate.toolCall.

Both kinds map to this same type, so only toolCallId is guaranteed. A tool_call typically carries title, kind and status; a tool_call_update carries only the fields that changed (in the 2026-09-08 probe, most updates were { toolCallId, status } alone). So a consumer keys rows by toolCallId and patches the fields that are present — never overwrite a title with undefined.

A tool_call_update for a call whose opening tool_call never arrived is a real shape; render it rather than dropping it.

Properties ​

toolCallId ​

ts
readonly toolCallId: string;

Defined in: packages/sdk/src/agents-service.ts:723

Beta

The call's id — stable across its tool_call and every tool_call_update, and the same id an AgentPermissionRequest.toolCallId refers to.

title? ​

ts
readonly optional title?: string;

Defined in: packages/sdk/src/agents-service.ts:727

Beta

Human-readable label, e.g. "Read notes.md". Present on the opening tool_call, and on an update only when it changed — agents do relabel a call as it progresses.

kind? ​

ts
readonly optional kind?: string;

Defined in: packages/sdk/src/agents-service.ts:732

Beta

The protocol's coarse category: "read", "edit", "delete", "move", "search", "execute", "think", "fetch", "switch_mode", "other", or a vendor's own. Tolerate unknown values; do not switch exhaustively.

status? ​

ts
readonly optional status?: string;

Defined in: packages/sdk/src/agents-service.ts:736

Beta

"pending", "in_progress", "completed", "failed", or a vendor's own. Not every agent walks the whole ladder — claude-agent-acp 0.75.1 went pending → completed with no in_progress.

content? ​

ts
readonly optional content?: readonly AgentToolCallContent[];

Defined in: packages/sdk/src/agents-service.ts:739

Beta

What to show inside the row. Absent on an update that changed something else — treat that as "unchanged", not "now empty".

locations? ​

ts
readonly optional locations?: readonly AgentToolCallLocation[];

Defined in: packages/sdk/src/agents-service.ts:741

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The files this call touches.

rawInput? ​

ts
readonly optional rawInput?: unknown;

Defined in: packages/sdk/src/agents-service.ts:746

Beta

The arguments the agent passed to its own tool, exactly as it sent them. Vendor-shaped by definition — the protocol places no schema on it, so it is typed unknown: narrow it yourself, and expect a different shape from each agent.

rawOutput? ​

ts
readonly optional rawOutput?: unknown;

Defined in: packages/sdk/src/agents-service.ts:748

Beta

The tool's own result, same caveat as rawInput.