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jasoncronje

Arc Browser MCP

by jasoncronje

arc_query_tabs

Read-onlyIdempotent

Search and filter Arc browser tabs by domain, space, folder, or query using the local index for fast results.

Instructions

List, filter, and search Arc tabs using the fast local Arc index.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
queryNo
space_idNo
locationNo
folder_idNo
domainNo
missing_urlNo
duplicate_keyNo
limitNo
cursorNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior3/5

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

Annotations already indicate read-only, non-destructive, and idempotent behavior. The description adds 'fast local Arc index' hinting at performance but does not disclose pagination, result limits, or other behavioral traits beyond what annotations provide.

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 that front-loads the key action and resource. It is appropriately concise, though it could be slightly more 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?

Given 9 optional parameters and a complex output schema, the description lacks essential context about how to use the filters, what the return data looks like, and any default behavior (e.g., limit of 50). It is insufficient for an agent to understand the tool's full capability.

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

Parameters1/5

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

Schema description coverage is 0%, so the description must explain parameter meanings. It only says 'list, filter, and search' without mentioning any of the 9 parameters (query, space_id, location, etc.), leaving the agent with no semantic clues.

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 specifies the action (list, filter, search), the resource (Arc tabs), and distinguishes from siblings like arc_get_tab which retrieves a single tab. It also notes the use of a fast local index.

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 on when to use this tool over alternatives such as arc_get_tab or arc_search_history. The description does not mention context or exclusions.

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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