import type { ToolExecuteResult } from "@kenkaiiii/gg-agent";
/**
 * Convert an MCP tool's content array into a result the model can actually
 * consume, covering the whole `ContentBlock` union rather than text alone.
 *
 * Text-only results stay plain strings so the overwhelmingly common path keeps
 * its existing shape (and the agent loop's string budgeting still applies).
 * Images are re-encoded through {@link shrinkToFit}, the same helper the `read`
 * tool uses: an unbounded screenshot from a third-party server would otherwise
 * exceed provider size limits and fail the whole turn. A media type the buffer
 * contradicts is corrected there too, since providers reject mismatches.
 *
 * Anything not viewable — audio, a resource link, a binary blob, an unreadable
 * image — becomes a text note instead of vanishing. A block silently dropped is
 * one the model never learns existed, so it answers as though the server
 * returned nothing; a note lets it say what it actually got.
 *
 * All text is stripped of invisible Unicode tag characters first. This is the
 * single point every MCP server's output passes through on its way into the
 * model's context, and a third-party server is exactly the party that would
 * hide instructions where neither the user nor the transcript can show them.
 */
export declare function toToolResult(content: unknown[], toolName: string): Promise<ToolExecuteResult>;
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