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sifter-ai

sifter-mcp

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create_sift

Create a new sift to extract structured data from documents using natural language instructions, and optionally link it to a folder path for organization.

Instructions

Create a new sift with the given extraction instructions.

Args:
    name: Human-readable sift name
    instructions: Natural language extraction instructions (e.g. "client, date, total")
    folder_path: Optional folder path to link (e.g. '/invoices/2025'); created if it doesn't exist

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYes
instructionsYes
folder_pathNo
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations provided, so the description bears the full burden. It mentions that the folder_path will be created if it doesn't exist, but lacks details on side effects, required permissions, error handling, or return behavior.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely concise: one sentence followed by a structured Args list. No redundancy, every part is necessary.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The description covers all parameters adequately but omits the return value or any confirmation of success. Given there is no output schema, the description should mention what the tool returns (e.g., the created sift object). Error cases (e.g., duplicate name) are also not addressed.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema descriptions are absent (0% coverage), but the description adds meaningful context for each parameter (e.g., 'Human-readable sift name', 'Natural language extraction instructions', 'Optional folder path to link'). This compensates well but could be more detailed.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action: Create a new sift with extraction instructions. It specifies the resource (sift) and the key parameters, distinguishing it from siblings like update_sift or delete_sift.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No explicit guidance on when to use this tool versus alternatives (e.g., update_sift). While the name implies creation, the description does not mention prerequisites, conflicts, or avoidances.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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