Brickbank

• blocks_search — Find the block op for a task: up to 5 ranked rows with block, op, job, purpose, price and a cheaper sibling. Free.
• blocks_describe — Everything needed to call one op: input schema, output schema, annotations, price and an example. Free.
• blocks_run — Run one op of one block. `arguments` is exactly the op's own arguments (see blocks_describe), including idempotency_key and confirm_token. Paid as the op's pric
• get_run — Check a run started by another tool: returns its status and, once done, its outcomes. Free.
• blocks_estimate — What a blocks_run of the same call would cost and which upstreams it would contact, without running it. `input` is the arguments object a blocks_run of that cal
• retry_run — Run again only the failed items of a finished run of yours, under the same run id. Costs what those items cost; send dry_run:true to see the range first.

No hidden text found in the tool definitions.

Text a person reading a tool definition does not see and a model does. Invisible characters can be pasted in by accident; this says what is there, not why. Covers tools only, not prompts or resources.