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Polymarket Arbitrage

polymarket_arbitrage
Read-onlyIdempotent

Find arbitrage opportunities on Polymarket via monotonicity violations + partition-sum checks. Call with NO args for a trending_scan of the top ~200 markets by weekly volume; pass event for the strongest per-event partition_check, or topic for a themed cross-event scan. event (recommended for a specific market): pass a Polymarket event slug like "fed-decision-may-2026" or "when-will-bitcoin-hit-150k"; walks child markets, checks date-axis / threshold-axis ordering AND computes the partition_check (sum of YES prices across mutually-exclusive legs — should ≈1; deviations >3pp emit a BUY/SELL EVERY LEG signal). topic (for cross-event scanning): pass a seed question like "Strait of Hormuz traffic returns to normal" or "Fed rate decision"; searches related events across the platform, flattens markets, runs the comparator on the union. Cross-event mode catches "...by May 31" vs "...by Jun 30" patterns that single-event misses. SEMANTIC ANCHOR: cross-event pairs require ≥0.30 Jaccard similarity on question tokens (prevents Powell-Fed-Pause being paired with Powell-DOJ-probe); skipped_low_similarity surfaces the rejected pair count. PARTITION FILTER: drops will-person-X / will-manager-Y / will-someone-else- placeholder slugs; partitions with >20% placeholder fraction return null arb signal. Response: opportunities[] (gap_pp, suggested_trade, reasoning, monotonicity violation context), and in event mode partition_check{sum_yes_prices, gap_from_1, placeholders_filtered, suggested_trade}. FILL CHECK: when the partition signal fires, arbitrage.fill_check prices it against live CLOB depth (theoretical_edge_pp_at_book vs realizable_edge_pp at 1000 shares/leg, thin_legs[]) — realizable_edge_pp ≤ 0 means the overround exists only at last-trade, not in the book; do not trade it. For custom sizing use polymarket_fill_risk.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
eventNoSingle-event mode (use this if you know the specific Polymarket event): event slug like "fed-decision-may-2026" or "when-will-bitcoin-hit-150k". Full Polymarket URLs also accepted.
topicNoCross-event mode (use this if you want to scan related events across the platform): a topic or seed question like "Fed rate decision" or "Strait of Hormuz traffic returns to normal". Tool searches Polymarket for related events and checks monotonicity across them.

TDQS

A5/5.0
Behavior5/5

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

With readOnlyHint=true and idempotentHint=true already in annotations, the description adds substantial behavioral context: the fill check with live CLOB depth, the warning that 'realizable_edge_pp ≤ 0 means the overround exists only at last-trade, not in the book; do not trade it,' the semantic anchor threshold, and the partition filter with placeholder slugs. This goes well beyond the basic annotations and helps agents understand the tool's actual behavior, including edge cases.

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 long but every section serves a purpose: mode selection, methodology, semantic anchoring, filtering, response structure, and fill-check warning are all clearly labeled and front-loaded. The dense use of capitalization and section markers makes it scannable, and there is no filler or repetition. It is appropriately detailed for a complex arbitrage detection tool.

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

Completeness5/5

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

The tool has no output schema and two optional parameters, yet the description fully covers what the tool returns (opportunities[], partition_check, fill check details), when to use each mode, and how to interpret signals. It also addresses potential pitfalls (thin legs, placeholder filters, low similarity) and directs users to a sibling tool for further custom sizing. This makes the description self-sufficient for an agent to select and invoke the tool correctly.

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

Parameters5/5

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

Although the input schema already provides 100% coverage for both 'event' and 'topic', the description significantly enriches this by explaining exactly how each parameter is used, providing example values like 'fed-decision-may-2026' and 'Strait of Hormuz traffic returns to normal,' and detailing the mode-specific behavior triggered by each parameter. This adds meaning beyond the schema's minimal descriptions.

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 opens with a specific, informative statement: 'Find arbitrage opportunities on Polymarket via monotonicity violations + partition-sum checks.' It clearly defines the tool's resource (Polymarket markets) and scope, and goes on to distinguish between trending, event, and topic modes, giving concrete examples. The description also names the sibling tool 'polymarket_fill_risk' for custom sizing, which differentiates it from related tools.

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

Usage Guidelines5/5

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

Explicit usage guidance is provided: 'Call with NO args for a trending_scan... pass event for the strongest per-event partition_check, or topic for a themed cross-event scan.' It recommends 'event' for a specific market, describes when 'topic' is preferable, and even identifies cross-event scanning advantages. It also directs users to 'polymarket_fill_risk' for custom sizing, giving a clear when-to-use-alternative.

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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TDQS

A3.6/5.0
Disambiguation2/5

Several tool clusters overlap heavily: ask_pipeworx and ask_pipeworx_beta are documented as functionally identical right now, and polymarket_arbitrage / polymarket_edges / polymarket_edge_tracker all surface trade opportunities with similar outputs. discover_tools and suggest_questions also cover similar 'what can I do' territory.

Naming Consistency3/5

All names are snake_case and many use verb_noun (query_layer, resolve_entity, generate_llms_txt), but a large minority use noun/adjective phrases (layer_info, recent_changes, polymarket_edges, bet_research) or bare verbs (remember, forget, recall). The pattern is readable but not fully predictable.

Tool Count2/5

34 tools is over the 25-tool threshold and deeply mismatched with the server name: only 3 of them (search_datasets, query_layer, layer_info) relate to ArcGIS Albuquerque. Most of the surface is a general-purpose Pipeworx data platform, making the set bloated and unfocused.

Completeness2/5

The advertised ArcGIS domain has only search-schema-query coverage: there is no way to list all datasets, apply spatial filters, or get service-level metadata. The Pipeworx half is feature-rich, but for the server as titled the tool surface has significant gaps and a large amount of irrelevant functionality.