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junxit

ForwardEmail MCP Server

by junxit

domain_sieve_create

Create a Sieve script for an email alias to define custom filtering rules, enabling automatic sorting, forwarding, or blocking of incoming messages.

Instructions

Create a Sieve filtering script for an alias.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYesScript name
domainYesDomain name or ID
contentYesSieve script content (RFC 5228)
alias_idYesAlias ID or name
priorityNoScript priority (lower runs first)
is_activeNoWhether the script is active
Behavior2/5

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

With no annotations, the description carries full burden for behavioral disclosure, but it only states creation. It does not mention validation, default values for priority/is_active, idempotency, authentication needs, 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.

Conciseness4/5

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

The description is a single clear sentence with no wasted words and is front-loaded with the verb. It is slightly undersized given the tool's context and sibling ambiguity, but it remains concise and well-structured.

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

Completeness2/5

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

The tool has 6 parameters, no output schema, no annotations, and is surrounded by many similar sibling tools. The one-sentence description does not clarify return values, default behavior, or the relationship between domain and alias, leaving significant gaps.

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

Parameters3/5

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

The input schema has 100% parameter coverage with descriptions for all 6 fields, so the description does not need to add much. The description itself adds no parameter details beyond what the schema already provides, so baseline 3 is appropriate.

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

Purpose4/5

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

The description clearly states the verb 'Create' with the resource 'Sieve filtering script' and the scope 'for an alias'. However, it does not explicitly differentiate this tool from the sibling 'sieve_script_create', which could be ambiguous.

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 guidance is provided about when to use this tool versus the many sibling sieve/script tools. There are no exclusions, prerequisites, or alternatives mentioned.

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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